Hey guys, I made the transfer to the RMBP and I love it. I didn't really think about using bootcamp to add Windows 7, but I could get windows 7 professional or ultimate for free. (My girlfriends college gives various free software) First, what exactly is the difference in windows 7 pro and ultimate? Second, if I downloaded the file would it be a Mac readable .iso? Then, I would have to put it onto a usb, but how big would it have to be? Finally, just follow the rules inside the bootcamp app. If I missed anything, please tell me. Thank you.