OK.. nLite will make a bootable ISO from the XP files you just slippstreamed updated and reduced and save it to a diferent location on the HDD, meaning youll have 2 versions of XP on the HDD, the bootable one and the other non-bootable files you just modified. You dont have to make the bootable ISO right away, you can skip this step and close nLite and slipstream XPize or DriverPacks, then you can reopen nLite and make the ISO. You dont have to do everything @ once