Hello, I have an eMac using os 10.4.3 and a WD Dual-option external USB 2.0 Hard Drive I use for backup. I've been reading "Take Control of Mac OS X Backups" and it says that you can boot from an external FireWire drive but not from a USB 2.0 hard drive. If I use a cable that connects to a firewire port on my computer to my hd will this work? Thanks Wilton