NVIDIA have posted a new nForce Unified Drivers for 2000/XP, version 2.45. Here's the Release Notes;

WHQL certified kit for nForce & nForce2 (NOTE: the graphics drivers in the English only kit is not WHQL certified. However, it is the same driver version as the international kit).
Includes support for nForce2 400 & nForce2 Ultra 400.
EAX fixes & compatibility improvements in - Operation Flashpoint, Neverwinter Nights, The Matrix Reloaded, Grand Theft Auto: ViceCity, Mafia & Battlefield 1942.
Updated audio control panel.
3D audio performance improvements.
NOTE: NVIDIA accelerated IDE drivers are not included in this release.

Download Now. Audio wise we've got the nForce APU Control Panel covered right here.