For Windz I only archieved a working result in generating a bat file that I call after that. So the current cmd (32 or 64 bit) will do the job. If your XP is 32bit it seems to me that this is the main problem!
Please have a look in your temp folder. There you should find a file called ~letgui.bat.
Please have a look in your temp folder. There you should find a file called ~letgui.bat.