Chaintech 7AIA BIOS update for 160GB HD support

Hi, I'm trying to find out if there is a BIOS update for the Chaintech
7AIA0 motherboard that will allow me to access a hard drive > 137GB
with Win98SE. I emailed Chaintech support and they said there is an
update that will support 250GB, but when I look through all the 7AIA0
BIOS updates, none of the release notes mention anything about support
for larger hard drives, and in fact, the latest update says it's not
for the -F10AC BIOS - my BIOS chip is labelled -F10C. SO I'm hesitant
to flash that update.
I've tried to get more info out of Chain tech support, but they
won't respond... so I'm hoping someone can answer these questions:

1) Is there a BIOS update for the 7AIA0 motherboard that would support
a 160GB HD under Win98SE ?

2) Are the BIOS updates for this motherboard that say "Except 7AIA0-
D10AC / E10AC / F10AC / G10AC / H10AC" (see link below) compatible
for upgrading a BIOS device labelled
"7AIA0-F10C ? (NOTE: mine is -F10C vs. -F10AC)

http://web.archive.org/web/20041009181437/www.chaintech.de/BIOS/BIOSUPD8.htm


Thanks in advance for any information that would help.

mm