I want to run Windows 7 on a 27" iMac. Only the Windows 7, it's for a family member who will only enjoy using Windows 7 and who will REALLY enjoy the look and all-in-one of a iMac. I am buying a new iMac, so what do I need for the bootcamp side? Do I need a stand-alone Windows 7 licence? (like, should I find a Windows 7 licence on Ebay (since they are no longer available from Microsoft) and is there a version that works better than another? (Windows Ultimate VS Home Premium) Or can I use the key off an old laptop, provided I have an install disk? I don't want a hack or sneaky cheat, because if there's ever a problem I want to be able to reinstall everything and so on. Any direction from those who've done it and found an advantage one way or another would be very much appreciated... Thanks in advance!