On the BartPE CD, (one of my admin toolkits) the version of ghost for it will work with whatever disks that the XP image can see. USB drives (as long as they are plugged in and powered at boot time) work just fine. I'm not certain about Firewire drives, though...
Oh, also:
Date: 2006-09-12 01:59 pm (UTC)AND burner support, with the appropriate plugins.