boot to MS-DOS using a floppy. Put a blank floppy in and right click on it in my computer and click format. Click the MS-DOS boot box first, then format the disk. On a separate disk, load AFUDOS and the .rom file you downloaded.
Reboot to your floppy (you may have to change bios boot settings). When the DOS prompt comes up, eject the boot disk and put in the AFUDOS floppy. At the prompt type:
AFUDOS /i[biosromname.rom] and it will update your bios.
If the bios rom name was BIOS0709.rom, the line would look like this:
AFUDOS /iBIOS0709.rom --> NOTE, there is NO SPACE between the i and the rom name.
You may want to back up your old bios first.
Use AFUDOS /o[filename] where [filename] is whatever you want.