What exact software do I need to run Windows 7 on my late 2009 Macbook and a new 2011 iMac 27" I'll be getting soon? Is there NO WAY I can get around purchasing two separate copies of the $200 Windows 7 Home Premium install CDs? Can't I just buy one and somehow contact Microsoft to get them to give me a second CD key or something...? Sorry if I sound so confused. I walked into Best Buy today thinking I could purchase Microsoft Office and Windows 7 Home Premium and be able to install both on up to three computers, all for less than $300 before taxes. Then I found out that the Windows 7 version I required was actually $200, and that version would ONLY run on one computer, and suddenly I'm looking at spending twice as much money as I originally intended. Please help!