I'm running Kubuntu 12.04. I need to update my motherboard BIOS. The Arch Linux Wiki says, "By far the easiest way to make a bootable FreeDOS USB Stick is using unetbootin." So I did that.
Using UNetbootin I succeeded in installing FreeDOS 1.0 (fdboot.img) on the USB stick.
Now, however, I am having a hard time figuring out though how to add files so that I can access them from FreeDos.
The Arch Linux wiki says, "Finally, you may copy everything you want to flash there (BIOS, firmwares, etc)." I did that and then I rebooted into FreeDos. The files were no where to be found. I had a "A:>" prompt with only FreeDos system files. No other drives were available and the files I had copied to the root of the USB stick could not be found.
BTW, my BIOS image is 4.0 MB in size.