So it will, absolutely, one hundred percent, out of the box, boot from either a USB or a Firewire OPTICAL drive? I know that it can boot from a firewire or optical HARD drive, but my friend swears up and down that his macbook pro will not boot off a USB OPTICAL drive.
I am asking and trying to make perfectly sure because this same friend's SuperDrive got killed by the 10.4.10 update and never bothered calling Apple to get it replaced. Now he is out of warranty and staring at a ~$180 fee for a new SuperDrive. However, he found an external, bus-powered, slim, firewire DVD Burner for $90 somewhere. He doesn't want to spend that money only to find out that his system won't boot from it.