Will the upgrade version of Vista Home Premium install on a mac? I think it requires booting from the dvd and holding down a key combination??? Not sure... I know it can install over itself to become a full version, but I was just wondering if it can even install the first time. Thanks Also I was told to run Vista 64 because it's more stable, but wow, that thing is expensive! Does anyone know somewhere cheap I can get the 64 bit version?