Microsoft IDE driver, or AMD ?
http://www.amd.com/us-en/Processors/TechnicalResources/0,,30_182_871_2336~4512,00.html
In Win98SE, I've always used the AMD IDE driver, and found it 100% compatible - not sure if the 2002 driver is an improvement on the current Microsoft SP revisions though (it covers all versions, but is only WHQL'd for 2k/XP).
I'd combine it with the appropriate other drivers ... hol;d on, I'll look up the board, as I'm thinking a "FULL" AMD chipset, and it may be a half and half with VIA southbridge.
Full AMD
http://www.motherboards.org/reviews/motherboards/1171_2.html
762 Northbridge (RAM, CPU, AGP, PCI-66) and 768 Southbridge (IDE, PCI-33, USB, AC97 & legacy ports support)