I opened package contents on bookcamp assistant and deleted the pre usb thingy so then I get an option to put the windows 7 .iso on my flash drive. I then moved on to selecting install windows 7, then portioned my HDD giving then windows part 140GB. The macbook powered off/restarted to load windows up but a blank screen appeared stating ...no bootable drive found, even though my flash drive is in the macbook still. well I have managed to get back to my macbooks desktop. The version of windows I downloaded is 32 bit could that be why it didn't work? I am downloading a 64 bit version now. Is there anyother reason why windows isn't booting up from my flash drive? should I try windows 8? cheers.