Greetings Macrumors! A month or two ago a few friendly uses on MR helped me successfully install windows on my boot camp with drivers in 64 bit mode. I used a windows 7 Ultimate disk that has 32 & 64 and then just chose 64. Then updated it to 8 then 8.1. It runs but its not perfect and i wish to go back to windows 7. but i have a little dilemma. The disk that i used that has both versions is a fixed *cough* disk. I want to use a legal disk but the macbook refuses to boot from a 64bit disk. I have windows 7 home premium and want to use the key code on the macbook. but i want 64 bit. Is there a way to trick the EFI to boot 64 bit on my legal DVDs? I also have all versions of windows compiled on a USB drive that are 64X but my macbook doesnt want to see it at boot menu select.Anyone figure this out? I have windows 7 Home with service Pack 1.