Hey, i have not been able to find this so. I have Windows XP home on my computer and was planing on being apart of the Windows 7 beta testers. I am kinda tech savey (Enough to put 7 beta on my pc and install everything) but i also want to go back to XP when the beta closes. I no longer have the install disk for xp and my other computer came with Vista Home Premium but it had no disk with it when i bought it (That kinda pissed me off) so i cannot install vista on the computer that i am planing to run the beta on. I would rather not need to buy a XP disk seems how i plan on buying 7 when it comes out completely, but until then i kinda want to put XP back on the computer when the beta expires. Can you help me?