Can all Macs with Built in USB boot off of a USB hard drive? I know blue G3's with firewire couldn't boot off of a firewire drive, is there a similar thing for USB? And of coarse the next question is, is there some sort of adapter that will convert a FireWire drive into a USB Drive? I really want a solution to boot older Macs off of my iBook, like I do now with more modern Macs, because it is chalk-full of all sorts of tools and utilities.