This is an upgrade question for which I can not find the answer. I have an IMAC recently upgraded to 10.6.2. I am running boot camp and Parallels 5 with one copy of Vista Ultimate 32 bit for both. I would like to upgrade to Win 7 64 bit and do not know how to proceed and in what sequence things should be done. I understand I can't do an upgrade because of the 32 bit - 64 bit issue - is that correct? Any help would be appreciated.... Thanks, applelisa