Hope this helps you:
1) Make a bootable floppy ( in DOS, format A: /s)
2) Look at
this page. (below is © Copyright 2004 Lejabeach Dot Com, Inc)
Especially note this:
A method of flashing an Award BIOS is to automate it. By creating a prepared bootdisk with the flashing utility and the BIOS .bin file on it, you can create a bootable disk that will flash the BIOS and perform other functions for you without having you type anything. After you have created a bootable floppy, using you favorite text editor, open the autoexec.bat file located on the floppy disk. If one is not present then just save the file once you have created it to the floppy as autoexec.bat. The following code will completely automate the flashing procedure for you:
@echo off
if exist oldbios.bin goto old
awdflash.exe newbios.bin oldbios.bin /py /sy /cc /cp /cd /sb /r
goto end

ld
awdflash.exe oldbios.bin /py /sn /cc /cp /cd /sb /r
:end
So you just copy the above code, paste it into a text file, save to floppy with the name Autoexec.bat (I don't know how to suppress the smiley in the above code, but it should read colon zero, not smiley)
3) Then you also save your unzipped BIOS file on your floppy.
4) Also save awdflash.exe file on your floppy.
5) Power off, shove floppy in, power up. It runs the flashing all by itself, you don't type any commands. At least, that's how it works for me.