Originally Posted by opelfruitcase
AFAIK, you can't gain direct write access to any hardware under NT-based Windows kernels (including direct access to the BIOS) so can't see how any utility like this would work.
However, I can suggest that XP does indeed allow you to create an MS-DOS boot disk under XP - simply go to format the floppy from Windows Explorer context menu in the normal way, and there should be an option there to create an MS-DOS start up disk.
Direct BIOS access is perfectly possible, It's one of the reasons CTRL-ALT-DELETE is reasonably secure, as this particular key combination is handled by the BIOS and not the operating sytem, that way it's harder for Viri/Worms etc to mimic it.
Don't know about other manufactures, but my ABIT NF7-S has been flashed through Windows several times.