I can't find the MULTIPLE party / Memorize Multiple inventories script

#===============================================================================​​
# RMVX
# Multiple Simultaneous Inventories by IMP1 | Version 1.0 | 6th November 2011
#-------------------------------------------------------------------------------
# This script enables the party to have more than one inventory.
#===============================================================================​​
$imported ||= {}
$imported["IMP1"] ||= {}
$imported["IMP1"]["Multiple Simultaneous Inventories"] = 1.0
#===============================================================================​​
# Instructions:
#===============================================================================​​
=begin

    * Set the amount of inventory you want in game.
    * Use the following event commands:

  $game_party.current_inventory = 4
    * This will set all party item dealings to deal with inventory 4.

    * Enjoy

=end  
module IMP_MSI
#===============================================================================​​
# Customisation Begin
#===============================================================================​​

  # The amount of inventories.
  Amount_of_Inventories = 8

#===============================================================================​​
# Customisation End
#===============================================================================​​
end

#===============================================================================​​
# Game_Party
#-------------------------------------------------------------------------------
#
#   Alised Methods:
#     * initialize
#
#   Overwritten Methods:
#     * items
#     * setup_battle_test_members
#     * gain_item
#     * item_number
#
#   New Methods:
#     * none.
#
#===============================================================================​​
class Game_Party

  attr_accessor :current_inventory

  alias non_mi_initialize initialize unless $@

  def initialize
    non_mi_initialize
    @current_inventory = 0
    @items = Array.new(IMP_MSI::Amount_of_Inventories)
    @weapons = Array.new(IMP_MSI::Amount_of_Inventories)
    @armors = Array.new(IMP_MSI::Amount_of_Inventories)
    for i in 0...IMP_MSI::Amount_of_Inventories do
      @items[i] = {}
      @weapons[i] = {}
      @armors[i] = {}
    end
  end

  def items
    result = []
    for i in @items[@current_inventory].keys.sort
      result.push($data_items[i]) if @items[@current_inventory][i] > 0
    end
    for i in @weapons[@current_inventory].keys.sort
      result.push($data_weapons[i]) if @weapons[@current_inventory][i] > 0
    end
    for i in @armors[@current_inventory].keys.sort
      result.push($data_armors[i]) if @armors[@current_inventory][i] > 0
    end
    return result
  end

  def setup_battle_test_members
    @actors = []
    for battler in $data_system.test_battlers
      actor = $game_actors[battler.actor_id]
      actor.change_level(battler.level, false)
      actor.change_equip_by_id(0, battler.weapon_id, true)
      actor.change_equip_by_id(1, battler.armor1_id, true)
      actor.change_equip_by_id(2, battler.armor2_id, true)
      actor.change_equip_by_id(3, battler.armor3_id, true)
      actor.change_equip_by_id(4, battler.armor4_id, true)
      actor.recover_all
      @actors.push(actor.id)
    end
    @items = [{}]
    for i in 1...$data_items.size
      if $data_items[i].battle_ok?
        @items[0][i] = 99 unless $data_items[i].name.empty?
      end
    end
  end

  def gain_item(item, n, include_equip = false)
    number = item_number(item)
    case item
    when RPG::Item
      @items[@current_inventory][item.id] = [[number + n, 0].max, 99].min
    when RPG::Weapon
      @weapons[@current_inventory][item.id] = [[number + n, 0].max, 99].min
    when RPG::Armor
      @armors[@current_inventory][item.id] = [[number + n, 0].max, 99].min
    end
    n += number
    if include_equip and n < 0
      for actor in members
        while n < 0 and actor.equips.include?(item)
          actor.discard_equip(item)
          n += 1
        end
      end
    end
  end

  def item_number(item)
    case item
    when RPG::Item
      number = @items[@current_inventory][item.id]
    when RPG::Weapon
      number = @weapons[@current_inventory][item.id]
    when RPG::Armor
      number = @armors[@current_inventory][item.id]
    end
    return number == nil ? 0 : number
  end

end # Game_Party