PLUS I forgot to mention, deflated XP or a PE version of XP means NO DIRECT X which mean most games wont play... Why not just do what they said, get some small HDDs, hell I got a handful I'll sell you cheap, and install a real full copy of XP on each one... For what you want to do, this is perfect, you can hide the caddy under the CP so when you pull it off to change the CP out you can do the HDD at the same time.