[RMVX ACE] HOW TO ADD A HELP WINDOW TO ACTOR COMMAND?

class Window_Help < Window_Base
  def set_text(text)
    msgbox(text)
    if text != @text
      @text = text
      refresh
    end
  end
end

class Window_ActorCommand < Window_Command
  def initialize(help_window)
    super(0, 0)
    self.openness = 0
    deactivate
    @actor = nil
    @help_window = help_window
  end
  
  def show
    if @help_window != nil
      @help_window.show
    end
    super
  end
  
  def hide
    if @help_window != nil
      @help_window.hide
    end
    super
  end
  
  def refresh
    super
    case self.index
    when 0
      #Attack
      show
      @help_window.set_text("Physical attack on an enemy.")
    when 1
      #Defend
      show
      @help_window.set_text("Defends against attacks.")
    when 2
      #Item"
      show
      @help_window.set_text("Uses an item.")
    when 3
      #Escape
      show
      @help_window.set_text("Attempts to escape from battle.")
    else
      hide
    end
  end
end

class Scene_Battle < Scene_Base
  def create_all_windows
    create_help_window
    create_message_window
    create_scroll_text_window
    create_log_window
    create_status_window
    create_info_viewport
    create_party_command_window
    create_actor_command_window
    #create_help_window
    create_skill_window
    create_item_window
    create_actor_window
    create_enemy_window
  end
  
  def create_actor_command_window
    @actor_command_window = Window_ActorCommand.new(@help_window)
    @actor_command_window.viewport = @info_viewport
    @actor_command_window.set_handler(:attack, method(:command_attack))
    @actor_command_window.set_handler(:skill,  method(:command_skill))
    @actor_command_window.set_handler(:guard,  method(:command_guard))
    @actor_command_window.set_handler(:item,   method(:command_item))
    @actor_command_window.set_handler(:cancel, method(:prior_command))
    @actor_command_window.x = Graphics.width
  end
end

class Window_Help < Window_Base
  def set_item(item)
    set_text(item ? item.description : "")
  end
end