I'd like to make a bootable flash drive that I can use on both a BIOS system or Apple's EFI. It's easy enough to create one to boot from BIOS, and rEFIt seems to work. But since Apple doesn't support booting from a USB stick that isn't OS X, that doesn't seem to work. What would be the best way to do this? I hope that this is in the right section to post this. Thanks in advance!