Actually the driver on the HP site should work. The drivers download page only lists drivers for XP (that's what HP says), but HP has a bad habit of not telling you all the OSes supported by a driver (they don't want to support other OSes). But I read the readme for the audio driver after extracting it and it says it works with Windows 98, 98SE, ME, 2000, and XP.
Here's the link:
http://h10025.www1.hp.com/ewfrf/wc/s...os=228&lang=en