NSIS Issue on Chinese windows XP / 7

I have a simple silent installer script which installs a printer driver and then run a EXE. It works perfectly in English OS, but in both the Chinese Traditional and Simplified it will fail to find the folder where the files have been extracted, which is the user Temp folder.
Here is the script. Please let me know what solution is available.

# General Symbol Definitions

!define REGKEY "SOFTWARE\$(^Name)"



# Included files

!include Sections.nsh

!include "FileFunc.nsh"

!include LogicLib.nsh





#!insertmacro GetParameters



# Installer pages

Page instfiles



# Installer attributes

OutFile DriverX86.exe

CRCCheck on

XPStyle on

Icon "logo.ico"

SilentInstall silent

Var DEVICE_NAME

# Installer sections

Section -Main SEC0000

    StrCpy $DEVICE_NAME "XXXX Device"    

    SetOutPath $TEMP\UPD

    SetOverwrite on

    File /a /r Print\Win_2KXP\*    

    ExecWait "rundll32 printui.dll PrintUIEntry /if /b $\"$DEVICE_NAME$\" /f $TEMP\UPD\somefile.inf /m $\"XXXX Device$\" /r $\"LPT1:$\""

    Delete $TEMP\UPD\Win_2KXP\English\i386\*

    Delete $TEMP\UPD\Win_2KXP\English\*

    Delete $TEMP\UPD\Win_2KXP\i386\*

    Delete $TEMP\UPD\Win_2KXP\*

    RMDir /r $TEMP\UPD\i386

    RMDir /r $TEMP\UPD\English\i386

    RMDir /r $TEMP\UPD\English

    RMDir /r $TEMP\UPD

    SetOutPath $TEMP\BPTracker

    SetOverwrite on

    File /a /r WIN-DS3IVPKX4GX_Install\*

    ExecWait "$TEMP\BPTracker\WIN-DS3IVPKX4GX_Install.exe /s"

    Delete $TEMP\BPTracker\WIN-DS3IVPKX4GX_Install.exe

    RMDir $TEMP\BPTracker

SectionEnd



# Installer functions

Function .onInit

    InitPluginsDir

FunctionEnd

The problem seems to be in the $TEMP variable. When the installer is executed the system is unable to find the Driver files which is located in $TEMP\UPD