You will need two floppy disks to flash the BIOS 
Disk1 -bootable DOS/WIN98 disk with no memory managers (i.e. HIMEM.SYS or EMMM386)
Disk2 -blank diskette unzip files in this archive (Phlash16.EXE XXXXX.wph & flash.bat)

Step 1- boot with a DISK1 (DOS/Win98 boot diskette)
Step 2- Replace DISK1 with DISK2 and type "flash"

