I've got a crucial m4 and a "generic" optibay, where I put my Scorpio Black 750 gb. Best decision ever, my '10 MBP flies with it, and I've got all the hdd space that I need. However, I didn't realize Mac EFI is NOT very friendly when booting from external DVD drives... OS X installation DVD works, but everything else doesn't - Gparted, Ubuntu live CD, Windows 7 DVD (for bootcamp). I did search and find some old thread, and I guess it's a known subject... but from all the solutions suggested, I couldn't make them work. I installed rEFIt, made a bootable usb stick, and so on, but nothing. Any case of success "fooling" the MBP EFI to boot from another OS? Thanks.