If your BIOS flash can run from command prompt, you could take a Windows 98 SE Emergency Repair Disk, pop it in a Floppy drive, grab the contents through Roxio Easy CD Creator, and through the OTHER Tab within Roxio create an emulated bootable floppy disk file. Then take that file and burn it to CD using the Make Bootable CD Feature.
But before creating your *.BIN file, and burning the *.BIN as an *.ISO image to a CD-R, alter the floppy's Autoexec.bat file to start the BIOS Flash utility. Dump out unnecessary routines and add a command to point to the flash.COM or EXE file, and copy the utility to the floppy in the root, so it will run on start up. If you are lacking room on the 1.44MB Floppy, take out any unnecessary stuff like Format, etc, DOS Tools. Then burn the project to the CD from the floppy through this tool in Roxio.
Now you should be able to place the Bootable CD into your systems requiring flashing, and have it boot in a Win 98 command environment and have the Flash utility start. You then may have to interact with the Flash Utility to verify that you do want to flash the system etc.
I've done this before to convert my Windows Emergency Disks to CD's. Floppies always get chewed up by dirty floppy drives, CD's are much tougher if cared for... BUT This only works for systems with bootable CD support after POST. If the computer is older than 6 years old, you might find it not able to start from CD after POST..... Good Luck.... ((( Also Verify that the BIOS Flash can operate under the Win 98 SE command environment ))) ... It should.... 8-)
Dave