So I've got an eMac that's mostly working (running Tiger, plus a buttload of other nice software), but has a busted optical drive. I have a spare USB optical drive lying around, and it works for most purposes, but, according to this discussion on the Ars Technica OpenForum, most PowerPC Macs (including eMacs) can't boot from USB drives (at least not out of the box and without a LOT of tinkering and swearing), although they can boot from FireWire drives.

Just in case I ever have to reinstall Mac OS X on the eMac, here's my question: if I plug a USB-to-FireWire adapter into one of the eMac's FireWire ports, and plug the USB optical drive into that, will the eMac be able to boot from said optical drive, or will I have to shell out for a FireWire optical drive?