I want to install Windows 7 in Boot Camp and then install Fusion and have it load the Windows 7 boot camp partitian as needed. I want 64 bit. I don't think I need anything better than Home Premium. But prices on Amazon are all over the place. $89-199... all say "Home Premium" but some are OEM, some are family packs, some are upgrade, some are full installs... grrr! What the hell is wrong with Microsoft?!! I have a serial from XP if that matters. (I never downgraded to Vista. ) Thanks!