Source: http://www.rmxpunlimited.net/scripts/rmvx/item/point-spend-system
            http://www.hbgames.org/forums/viewtopic.php?f=11&t=67661 

  Drago del Fato씨의 레벨업시 포인트로 스탯 올리는 스크립트의 VX버전입니다. 

#==========================================================================
# ** RMVX Drago del Fato - PointSpendSystem
#    -              Type: Custom Material
#    -            Author: Drago del Fato
#    -           Version: 1.05
#    - RPG Maker Version: VX
#    -    Implementation: Put in Materials list.
#------------------------------------------------------------------------------
# When you gain a new level in your RPG your character attributes will need to
# be manually increased instead of automatically. You can set a specified number
# of points user can spend on each level as well as how much each attribute will
# be increased. If you use this script please give credits, thx ^^
#=========================================================================
  
 #--------------------------------------------------------------------------
 # * Phase 1 - Language and Other Resources
 #--------------------------------------------------------------------------
  
  
 #--- Main Text Resources
 PSS_TEXT = "You've got to a new level! Do you want to spend your points now?"
 PSS_ANSWERS = ["Yes","No"]
 PSS_ACTOR_TEXT = "[Lv +]"
  
 PSS_DESCRIPTION = "Left - Decrease, Right - Increase, C - Confirm, B - Cancel"
 PSS_B1 = "Reset Current Modifications"
 PSS_B2 = "Save Modifications"
 PSS_B3 = "Cancel"
 PSS_RES1 = "Special Points Left - "
 PSS_RES2 = "Are you sure with this?"
  
 PSS_SEP = " <> "
  
 PSS_NAME = "Name"
  
 #--- Other Resources
 $PSS_POINTS = 6
  
 PSS_HP = 10
 PSS_MP = 10
 PSS_ATK = 1
 PSS_DEF = 2
 PSS_SPI = 3
 PSS_AGI = 4
  
 #--- Set to True if you want to be notified until that character has points left
 PSS_NOTIFY_POINTS = true
  
 #--- Global Resources (do not modify if you arent skilled in RGSS)
 $PSS_ACTOR_POINTS = []
 $PSS_ACTOR_LVL_UP = []
 $PSS_ACTOR_ATTR = [1,1,1,1,1,1]
 $PSS_ACTOR_ADD = [1,1,1,1,1,1]
 $PSS_RETURN_POINTS = 0
 $PSS_POINTER = [PSS_HP, PSS_MP, PSS_ATK, PSS_DEF, PSS_SPI, PSS_AGI]
    
 #--------------------------------------------------------------------------
 # * Phase 2 - Class Modifications
 #--------------------------------------------------------------------------
  
  
 class Game_Actor < Game_Battler
    
  #--------------------------------------------------------------------------
  # * Change Experience
  #     exp  : New experience
  #     show : Level up display flag
  #--------------------------------------------------------------------------
  def change_exp(exp, show)
    last_level = @level
    last_skills = skills
    @exp = [[exp, 9999999].min, 0].max
    while @exp >= @exp_list[@level+1] and @exp_list[@level+1] > 0
      level_up
      
      #-- Overwrite the new level parameters with past level one.
      if !$BTEST
       actor.parameters[0, @level] = actor.parameters[0, @level - 1]
       actor.parameters[1, @level] = actor.parameters[1, @level - 1]
       actor.parameters[2, @level] = actor.parameters[2, @level - 1]
       actor.parameters[3, @level] = actor.parameters[3, @level - 1]
       actor.parameters[4, @level] = actor.parameters[4, @level - 1]
       actor.parameters[5, @level] = actor.parameters[5, @level - 1]
      end
      
      #-- Add Points to an actor when he levels up.
      $PSS_ACTOR_LVL_UP[@actor_id] = true
      $PSS_ACTOR_POINTS[@actor_id] += $PSS_POINTS
      
    end
    
    #-- Level down is deleted.
    
    @hp = [@hp, maxhp].min
    @mp = [@mp, maxmp].min
    if show and @level > last_level
      display_level_up(skills - last_skills)
    end
  end
  
  def pss_change_actor_params(param_id, new_value)
    actor.parameters[param_id, @level] = new_value
  end
  
end
  
 class Scene_Title < Scene_Base
    
  #--------------------------------------------------------------------------
  # * Create Game Objects
  #--------------------------------------------------------------------------
   def create_game_objects
    $game_temp          = Game_Temp.new
    $game_message       = Game_Message.new
    $game_system        = Game_System.new
    $game_switches      = Game_Switches.new
    $game_variables     = Game_Variables.new
    $game_self_switches = Game_SelfSwitches.new
    $game_actors        = Game_Actors.new
    $game_party         = Game_Party.new
    $game_troop         = Game_Troop.new
    $game_map           = Game_Map.new
    $game_player        = Game_Player.new
    
    for i in 0..$data_actors.size - 2
      $PSS_ACTOR_POINTS.push(0)
      $PSS_ACTOR_LVL_UP.push(false)
    end
  end
  
end
  
#-- Draw Level Up when a character goes to a new level, delete this class if
#-- you don't like this
class Window_Base < Window
  
   def draw_actor_name(actor, x, y)
    self.contents.font.color = hp_color(actor)
    if $PSS_ACTOR_POINTS[actor.id] == 0
     self.contents.draw_text(x, y, 108, WLH, actor.name)
    else
     ts = self.contents.text_size(actor.name + PSS_ACTOR_TEXT)
     self.contents.draw_text(x, y, ts.width, ts.height, actor.name + PSS_ACTOR_TEXT)
    end
  end
  
end
#-- End of Level Up Character Name
  
class Scene_Status < Scene_Base
  
   def start
    #-- Original Status commands
    super
    create_menu_background
    @actor = $game_party.members[@actor_index]
    @status_window = Window_Status.new(@actor)
    #-- End
    if $PSS_ACTOR_LVL_UP[@actor_index + 1]
     @pss_help = Window_PSS_Help.new
     @pss_help.z = 9998
     @pss_help.refresh_3
     @status_window.opacity = 100
     @status_window.contents_opacity = 100
     @pss_confirm = Window_Command.new(300, [PSS_ANSWERS[0], PSS_ANSWERS[1]])
     @pss_confirm.x = 245
     @pss_confirm.y = 255
     @pss_confirm.active = true
    end
   end
  
   def update
    if @pss_confirm != nil and @pss_confirm.active
     @pss_confirm.update
     if Input.trigger?(Input::C)
      case @pss_confirm.index
      when 0
       @pss_confirm.visible = false
       @pss_help.visible = false
       $scene = Scene_PSS.new(@actor_index + 1)
      when 1
       @pss_confirm.visible = false
       @pss_help.visible = false
       @status_window.opacity = 160
       @status_window.contents_opacity = 255
     end
     elsif Input.trigger?(Input::B)
       @pss_confirm.visible = false
       @pss_help.visible = false
       @status_window.opacity = 160
       @status_window.contents_opacity = 255
     end
    end
    #-- Original Status commands
    update_menu_background
    @status_window.update
    if Input.trigger?(Input::B)
      Sound.play_cancel
      return_scene
    elsif Input.trigger?(Input::R)
      Sound.play_cursor
      next_actor
    elsif Input.trigger?(Input::L)
      Sound.play_cursor
      prev_actor
    end
    super   
    #-- End
  end
  
  def terminate
   #-- Original Status Commands
   super
   dispose_menu_background
   @status_window.dispose
   #-- End
   @pss_confirm.dispose if @pss_confirm != nil
   @pss_help.dispose if @pss_help != nil
  end
end
  
 #--------------------------------------------------------------------------
 # * Phase 3 - PointSpendSystem Scene
 #--------------------------------------------------------------------------
  
class Window_PSS_Help < Window_Base
  
  def initialize
    super(0,352,544,64)
    refresh
  end
  
  def refresh
    self.contents.clear
    ts = self.contents.text_size(PSS_DESCRIPTION)
    self.contents.draw_text(0,0,ts.width,ts.height, PSS_DESCRIPTION)
  end
  
  def refresh_2
    self.contents.clear
    ts = self.contents.text_size(PSS_RES2)
    self.contents.draw_text(0,0,ts.width,ts.height, PSS_RES2)
  end
  
  def refresh_3
    self.contents.clear
    ts = self.contents.text_size(PSS_TEXT)
    self.contents.draw_text(0,0,ts.width,ts.height, PSS_TEXT)
  end
  
end
  
  
class Window_PSS_Main < Window_Selectable
  
   def initialize(actor)
    super(0, 0, 544, 352)
    @actor = actor
    refresh
    self.index = 0
  end
  
  def refresh
    self.contents.clear
    
    #-- Draw Text Data
    ts = self.contents.text_size(PSS_NAME)
    self.contents.draw_text(160,32,ts.width,ts.height, PSS_NAME)
  
    ts_a = self.contents.text_size(@actor.name)
    self.contents.draw_text(170 + ts.width,32,ts_a.width,ts_a.height, @actor.name)
    
    ts = self.contents.text_size(Vocab.level_a)
    self.contents.draw_text(160,50,ts.width,ts.height,Vocab.level_a)
    
    ts_a = self.contents.text_size(@actor.level)
    self.contents.draw_text(170 + ts.width,50,ts_a.width,ts_a.height, @actor.level)
  
    ts = self.contents.text_size(Vocab.atk)
    self.contents.draw_text(160,96,ts.width,ts.height,Vocab.atk)
    
    ts_a = self.contents.text_size(@actor.base_atk)
    self.contents.draw_text(170 + ts.width,96,ts_a.width,ts_a.height, @actor.base_atk)
  
    ts = self.contents.text_size(Vocab.def)
    self.contents.draw_text(160,128,ts.width,ts.height,Vocab.def)
    
    ts_a = self.contents.text_size(@actor.base_def)
    self.contents.draw_text(170 + ts.width,128,ts_a.width,ts_a.height, @actor.base_def)
    
    ts = self.contents.text_size(Vocab.spi)
    self.contents.draw_text(160,160,ts.width,ts.height,Vocab.spi)
    
    ts_a = self.contents.text_size(@actor.base_spi)
    self.contents.draw_text(170 + ts.width,160,ts_a.width,ts_a.height, @actor.base_spi)
    
    ts = self.contents.text_size(Vocab.agi)
    self.contents.draw_text(160,192,ts.width,ts.height,Vocab.agi)
    
    ts_a = self.contents.text_size(@actor.base_agi)
    self.contents.draw_text(170 + ts.width,192,ts_a.width,ts_a.height, @actor.base_agi)
    
    ts = self.contents.text_size(Vocab.hp)
    self.contents.draw_text(160,224,ts.width,ts.height,Vocab.hp)
    
    ts_a = self.contents.text_size(@actor.base_maxhp)
    self.contents.draw_text(170 + ts.width,224,ts_a.width,ts_a.height, @actor.base_maxhp)
    
    ts = self.contents.text_size(Vocab.mp)
    self.contents.draw_text(160,256,ts.width,ts.height,Vocab.mp)
    
    ts_a = self.contents.text_size(@actor.base_maxmp)
    self.contents.draw_text(170 + ts.width,256,ts_a.width,ts_a.height, @actor.base_maxmp)
    
    p_text = PSS_RES1 + $PSS_ACTOR_POINTS[@actor.id].to_s
    ts_a = self.contents.text_size(p_text)
    self.contents.draw_text(170 + ts.width,290,ts_a.width,ts_a.height, p_text)
  
    #-- Draw Face
    draw_actor_face(@actor, 8, 32)
    draw_actor_graphic(@actor, 64, 180)
    
    s1 = Vocab.hp + " " + $PSS_ACTOR_ATTR[0].to_s + PSS_SEP + $PSS_ACTOR_ADD[0].to_s
    s2 = Vocab.mp + " " + $PSS_ACTOR_ATTR[1].to_s + PSS_SEP + $PSS_ACTOR_ADD[1].to_s
    s3 = Vocab.atk + " " + $PSS_ACTOR_ATTR[2].to_s + PSS_SEP + $PSS_ACTOR_ADD[2].to_s
    s4 = Vocab.def + " " + $PSS_ACTOR_ATTR[3].to_s + PSS_SEP + $PSS_ACTOR_ADD[3].to_s
    s5 = Vocab.spi + " " + $PSS_ACTOR_ATTR[4].to_s + PSS_SEP + $PSS_ACTOR_ADD[4].to_s
    s6 = Vocab.agi + " " + $PSS_ACTOR_ATTR[5].to_s + PSS_SEP + $PSS_ACTOR_ADD[5].to_s
    
    @commands = [s1,s2,s3,s4,s5,s6]
    
    for i in 0...6
      draw_item(i)
    end
    
    @item_max = 6
    @column_max = 1
    
  end
  
   def item_rect(index)
    rect = Rect.new(0, 0, 0, 0)
    rect.width = 200
    rect.height = WLH
    rect.x = 280 + (index % @column_max * (rect.width + @spacing))
    rect.y = 96 + (index / @column_max * WLH)
    return rect
  end
  
  def draw_item(index, enabled = true)
    rect = item_rect(index)
    rect.x += 30
    self.contents.clear_rect(rect)
    self.contents.font.color = normal_color
    self.contents.font.color.alpha = enabled ? 255 : 128
    self.contents.draw_text(rect, @commands[index])
  end
  
  def update
    super
  end
    
  
end
  
class Scene_PSS < Scene_Base
  
  def initialize(actor_id)
   @actor = $game_actors[actor_id]
  end
  
  def start
    get_attributes
    @pss_main = Window_PSS_Main.new(@actor)
    @pss_help = Window_PSS_Help.new
    @pss_confirm = Window_Command.new(300, [PSS_B1, PSS_B2, PSS_B3])
    @pss_confirm.x = 245
    @pss_confirm.y = 245
    @pss_confirm.visible = false
  end
  
  def set_attributes
    @actor.pss_change_actor_params(0,$PSS_ACTOR_ADD[0])
    @actor.pss_change_actor_params(1,$PSS_ACTOR_ADD[1])
    @actor.pss_change_actor_params(2,$PSS_ACTOR_ADD[2])
    @actor.pss_change_actor_params(3,$PSS_ACTOR_ADD[3])
    @actor.pss_change_actor_params(4,$PSS_ACTOR_ADD[4])
    @actor.pss_change_actor_params(5,$PSS_ACTOR_ADD[5])
   end
    
   def get_attributes
    $PSS_ACTOR_ATTR[0] = @actor.maxhp
    $PSS_ACTOR_ATTR[1] = @actor.maxmp
    $PSS_ACTOR_ATTR[2] = @actor.base_atk
    $PSS_ACTOR_ATTR[3] = @actor.base_def
    $PSS_ACTOR_ATTR[4] = @actor.base_spi
    $PSS_ACTOR_ATTR[5] = @actor.base_agi
    
    for i in 0..$PSS_ACTOR_ADD.size - 1
      $PSS_ACTOR_ADD[i] = $PSS_ACTOR_ATTR[i]
    end
    
    $PSS_RETURN_POINTS = $PSS_ACTOR_POINTS[@actor.id]
  end
  
  def subtract_points
    $PSS_ACTOR_ADD[@pss_main.index] -= $PSS_POINTER[@pss_main.index]
    
    #-- When subtracted, add points back
    $PSS_ACTOR_POINTS[@actor.id] += 1
    
    #-- No subtraction if values is less than original
    if $PSS_ACTOR_ADD[@pss_main.index] < $PSS_ACTOR_ATTR[@pss_main.index]
     $PSS_ACTOR_ADD[@pss_main.index] = $PSS_ACTOR_ATTR[@pss_main.index]
     $PSS_ACTOR_POINTS[@actor.id] -= 1
    end
  end
  
  def add_points
   if $PSS_ACTOR_POINTS[@actor.id] > 0
    $PSS_ACTOR_ADD[@pss_main.index] += $PSS_POINTER[@pss_main.index]
    $PSS_ACTOR_POINTS[@actor.id] -= 1
   end
  end
  
  
  def update
   @pss_main.update if @pss_main.active
   @pss_confirm.update if @pss_confirm.active
   if Input.trigger?(Input::LEFT)
    if @pss_main.active
     subtract_points
     @pss_main.refresh
    end
   elsif Input.trigger?(Input::RIGHT)
    if @pss_main.active
     add_points
     @pss_main.refresh
    end
   elsif Input.trigger?(Input::C)
    if @pss_main.active
     @pss_main.opacity = 100
     @pss_main.contents_opacity = 100
     @pss_help.refresh_2
     @pss_confirm.visible = true
     @pss_confirm.active = true
     @pss_main.active = false
    elsif @pss_confirm.active
     case @pss_confirm.index
     when 0
      for i in 0..$PSS_ACTOR_ADD.size - 1
       $PSS_ACTOR_ADD[i] = $PSS_ACTOR_ATTR[i]
      end
      $PSS_ACTOR_POINTS[@actor.id] = $PSS_RETURN_POINTS
      @pss_main.refresh
      pss_return_back
     when 1
      set_attributes
      $PSS_ACTOR_LVL_UP[@actor.id] = false
      if PSS_NOTIFY_POINTS
       $PSS_ACTOR_LVL_UP[@actor.id] = true if $PSS_ACTOR_POINTS[@actor.id] > 0
      end
      $scene = Scene_Map.new
     when 2
      pss_return_back
     end
    end
    
   elsif Input.trigger?(Input::B)
    if @pss_main.active
     $scene = Scene_Map.new
    elsif @pss_confirm.active
     pss_return_back
    end
   end
 end
  
 def pss_return_back
   @pss_main.opacity = 255
   @pss_main.contents_opacity = 255
   @pss_help.refresh
   @pss_confirm.visible = false
   @pss_confirm.active = false
   @pss_main.active = true
 end
  
 def pre_terminate
   @pss_main.dispose
   @pss_help.dispose
   @pss_confirm.dispose
 end
  
end