Mid '07 MB, 10.7.5. SuperDrive is stuffed so I changed info.plist to allow USB install media creation. I created a USB Win7 install via Boot Camp but when my laptop restarts after partition I get the Apple logo flashing with the prohibitory sign and occasionally the question mark folder. Install USB doesnt show on option boot, rEFIt wont work either. will Win7 just not boot from USB?