I downloaded Win7 Pro from the MSDN site. The file is an ISO. I was able to use a tool from MS to create a bootable USB stick from the ISO file. I cannot however get my Macbook Pro to see this drive. Ive tried rEFIt and that wasnt able to see it either. Ive read that MacBook Airs have the ability to create USB boot drives for Win7 using Bootcamp Assistant, but this is not an option when I run it. I am running Lion.