For those of you who have successfully installed Win64, which is better. a clean install of 64 or over Win XP Pro? I have backed up my hard drives to my external backup and have down loaded all the 64 drivers I can find for my Hardware. Now I may be asking this prematurely since I don't even know if this beta is an"upgrade or original version, but thought I'd try to head off any unnecessary problems. I'm actually thinking of taking a spare 80gb drive I have, loading Win xp on it, then try loading 64 on top of that so I don't have to nuke my Sata drive. Any suggestions? Thanks