Old Athlon K6 500 board....

Hello all, I'm a newbie to this board, though I have membership in another board similar to this. I will be visiting this board frequently to offer what advise I can.

But first off I have a problem... How many times have we offered to fix a mates computer... well I've got an oldie here... it is an older Athlon K6 500... Motherboard is unknown to me... no install disks available....I am having a problem with the PCI Multimedia Audio Device.... I have managed to download all other drivers this computer needs bar this one.... I will attach below what information I have gathered about this computer in the hopes that someone can point me in the right direction:

CPU: AMD-K6 500MHz (Socket 7)
Speed: 550MHz (Overclocked 5.5 multiplier used)
Video: Onboard - unknown..
Motherboard numbers: Socket 7
11S09N5392Z8NMBA07V080
IBM FRU 09N5392 PRO263 M/B 2000-07-27
Pro263 REV:3.0

Written on back of the board: UNIC 3 94V-0
E119697

Identified Chips: SIS5595 (SIS'99 PKC0044 0014a0 83) Looks like this is the PCI
controller
SIS6801 (ZB716EYS 0014AX A1)
SIS530 Main Chipset
ISSI (IS61SP6464-100PQ W1696200JM 0019)
ESS SOLO-1 (ES1936S H110 UTTADER16S)

Memory: 64 Meg Dimm


*NOTES*: Needs at least 128MB Ram added, and a decent PCI Graphics Card (16-32 meg).
PCI Mulitmedia Audio Device is not installed.
........................
That's all the info I have, but any replies would be appreciated.