SCRIPT CALL HELP

I have this really cool japanese script for RMVXAce from Tomaoky that displays fog during battle. It works great, the only thing I can't do is disable the script for certain battles. In other words, I just want this script to run on certain maps. Anyone know of a script call command? Thanks for your time.

#==============================================================================
# ★ RGSS3_バトルミスト Ver1.0
#==============================================================================
=begin

作者：tomoaky
webサイト：ひきも記 (http://hikimoki.sakura.ne.jp/)

戦闘シーンの背景に霧を表示します。

動作に必要な画像
Graphics/System/mist.png

使用するゲームスイッチ（初期設定）
0001

2011.12.15 Ver1.0
公開

=end

#==============================================================================
# □ 設定項目
#==============================================================================
module TMBMIST
SW_NOUSE = 1 # Battle mist disable flag used as a Game switch number
BLEND_TYPE = 1 # 霧画像の合成方法（0=通常 / 1=加算 / 2=減算）
MIST_NUM = 30 # 霧の量
end

#==============================================================================
# □ Sprite_Mist
#==============================================================================
class Sprite_Mist < Sprite
#--------------------------------------------------------------------------
# ● オブジェクト初期化
#--------------------------------------------------------------------------
def initialize(viewport)
super(viewport)
self.bitmap = Cache.system("mist")
self.blend_type = TMBMIST::BLEND_TYPE
self.ox = self.bitmap.width / 2
self.oy = self.bitmap.height / 2
setup
self.z += rand(570)
update_position
end
#--------------------------------------------------------------------------
# ○ セットアップ
#--------------------------------------------------------------------------
def setup
@base_x = rand(Graphics.width / 2) + Graphics.width / 4
self.z = 20
self.mirror = (rand(3) == 0)
update_position
end
#--------------------------------------------------------------------------
# ○ 座標の更新
#--------------------------------------------------------------------------
def update_position
self.x = (@base_x - (Graphics.width / 2)) * self.z / 128 + @base_x
self.y = self.z / 4 + 160
self.zoom_x = self.z * 0.003 + 0.25
self.zoom_y = self.zoom_x
self.opacity = (self.z >= 536 ? (600 - self.z) * 4 : self.z)
end
#--------------------------------------------------------------------------
# ● 更新
#--------------------------------------------------------------------------
def update
super
self.z += 1
self.z >= 600 ? setup : update_position
end
end

#==============================================================================
# ■ Spriteset_Battle
#==============================================================================
class Spriteset_Battle
#--------------------------------------------------------------------------
# ● 戦闘背景（床）スプライトの作成
#--------------------------------------------------------------------------
alias tmbmist_spriteset_battle_create_battleback1 create_battleback1
def create_battleback1
tmbmist_spriteset_battle_create_battleback1
@mist_sprites =
unless $game_switches
@mist_sprites = Array.new(TMBMIST::MIST_NUM) { Sprite_Mist.new(@viewport1) }
end
end
#--------------------------------------------------------------------------
# ● 戦闘背景（床）スプライトの解放
#--------------------------------------------------------------------------
alias tmbmist_spriteset_battle_dispose_battleback1 dispose_battleback1
def dispose_battleback1
tmbmist_spriteset_battle_dispose_battleback1
@mist_sprites.each {|sprite| sprite.dispose }
end
#--------------------------------------------------------------------------
# ● 戦闘背景（床）スプライトの更新
#--------------------------------------------------------------------------
alias tmbmist_spriteset_battle_update_battleback1 update_battleback1
def update_battleback1
tmbmist_spriteset_battle_update_battleback1
@mist_sprites.each {|sprite| sprite.update }
end
end

Sweet, thanks you Trihan!