I have a new MBP (sig) and went to my school bookstore to pick up Windows 7 for cheap since I'll need it when I start in the fall. They informed me that their Win 7 discs were upgrade discs and that I'd have to buy Vista first, and so I did. It is Vista Business and when I looked at my computer information found out that it is 32bit. I have both the 32 and 64 bit versions of 7 (giving the other to my brother) and when I popped in the Windows 7 64 bit it told me the installation disc wasn't compatible with my current version of Windows. So is there a way around to this? Both me and my brother (who has a Toshiba, not a Mac, although I don't think it matters) now have 32 bit versions of Vista and I would like to have the 64 bit version. And ultimately the 32 bit version would work right? I'd hate to leave the 64 bit version gathering dust.