How to flash this BIOS

I have PIII/550MHZ, 128MB RAM, WIN98SE, 20GB HDD. My motherboard is VIA ZX98-AT (BIOS B236910)The BIOS at the bottom while booting shows as: American Megatrends Inc, 61-0414-008031-00111111-071595-440BX-CRBX014-H (A.M. AMIBIOS (c) 1996 ver 1.07 (990805) chip 82443BX. I want to flash this BIOS (if recommended) but have been unable to find this BIOS number anywhere on the NET and foreign equivalents either. Please guide me as to where to find this particular BIOS flashing procedure. Many thanks.
Best Regards

Khushroo Dholoo