My 2012 13" MBA i5/8GB/256GB SSD will be arriving to my house in a couple of days. I have a few questions regarding Windows 7 and the Bootcamp drivers. 1. Can I use the Windows 7 ISO image that I downloaded to install Windows 7? even though I have the actual full version with the discs and product keycode. 2. Can I use 2 USB flash drives; one for the bootcamp drivers and one for Windows 7? 3. What are the recommended sizes of USB flash drives for bootcamp drivers and Windows 7?