A New nVidia nForce4 Drivers for Windows 2000/XP set was leaked by MSI.

Audio driver version 4.60 (WHQL)
Audio utility version 4.51
Ethernet NRM driver version 4.73 (WHQL)
Network management tools version 4.73
SMBus driver version 4.45 (WHQL) with updated uninstaller files
Installer version 4.61
Win2K IDE driver version 5.21 (WHQL)
Win2K RAIDTOOL application version 5.21
WinXP IDE driver version 5.21 (WHQL)
WinXP RAIDTOOL application version 5.21

Download: NGOHQ.com