I can see your problem, I haven't walked the situation like this before. Now I understand. We'll see what we can do.

I'm tired of floppies and although I have a physical one, I'm using USB-booting. Any Intel machine should do it fine. ASUS/Abit that I've tried usually argue with you that its not a FDD-USB, but HDD-USB and refuse to start. See if you have any luck.

http://en.wikipedia.org/wiki/El-Torito
Another thing is El-Torito, which means you can burn the floppy image to a CD (I recommend RW) so that it emulates a 1.44 (or even a 2.88MB) floppy. The problem is
you can't just open and edit files and then reboot. There should be a tick somewhere saying "enable FDD emulation" or something.

Try if any of these work.