And your helpful suggestion is? I've already tried WinSetupFromUSB. Maybe it is because you are using a tool outside it's intended usage paradigm. This tool has helped surely thoudands, likely tens of thousands, possibly hundreds of thousands people in installing XP from USB device. (people that were running XP) Some other tools, including he one wimb pointed you to or the "other app": have been developed since, some may work "better", some may NOT work, some may be working AND more convenient. Try looking at the half full glass , if you had this *need* before 2007 you would have had NO possibilities whatsoever . jaclaz