hello, i'm about to reinstall vista ultimate on my iMac since my beta version has expired. i also have to move the partition of boot camp to make it larger. when i first installed boot camp and vista last year i used the minimum space on the windows partition and only installed the 43 bit version of vista. i remembered hearing that there were some problems with the drivers or something with the 64 bit version. anyway, i now have a retail version of vista ultimate but i want to know if its cool to install the 64 bit version this time around or is it safer to just go with the 32 bit version? i have a 20" intel Imac. thanks for your help!