Hi. I just received my new retina MacBook Pro. My question is.. How do I install Windows 7 via Parallels since I don't have a CD drive. You would think I would be able to do this via CD/DVD Sharing from another Mac, however per this page: http://support.apple.com/kb/HT5287?viewlocale=en_US&locale=en_US, I can't do it apparently. How can I install Windows 7 into Parallels without a disk drive? Note that I do not have an external SuperDrive and have no intent to buy one. This is literally the only disk I will ever use most likely.