Booting from USB Flash Drive?

We would like to boot off of a USB Flash ("thumb") Drive in order to start ATI and restore a hard drive image. Our computers don't have floppies but do have USB CD drives, but an image restore from anywhere but the network would be comparatively slow.

We have had success with a DOS-based image restore program. We only had to make a DOS boot disk via Bart's Network Boot Disk, copy those files to the USB Flash Drive, set the BIOS to boot from "USB-HDD", it connected to a restore executable on a network share and away it went, but we cannot do the same with ATI because there seems to be no available DOS executable; the program is stored within the files that go onto the floppies/CD-ROM, and that only gets expanded when you are able to boot from them.

We told the MediaBuilder program to output the boot image to the USB Flash Drive, as MB showed it as a "removable drive", but it won't boot ("non-system disk").

Has anyone tried doing this? Are we missing something?

Thank in advance,
--
Jim Allison
Senior Customer Care Representative
SpeedLine Solutions Inc.