Here's a new set of nForce 430/410/590/570/550 mainboard chipset drivers 9.16 WHQL for Windows 2000/XP and Windows XP 64-bit!

Ethernet Driver MCP55 (v55.21) WHQL
Network Management Tools MCP55 (v55.23)
SMBus Driver (v4.52) WHQL To install (v5.05)
WinXP IDE SataRAID Driver (v6.66) WHQL
WinXP IDE SataIDE Driver (v6.66) WHQL
WinXP RAIDTOOL Application (v6.63)

Date from the Ethernet driver: 22/03/2006 & WHQL: from the 28/03/2006
Date from the Sata driver: 24/04/2006 & WHQL: from the 02/05/2006
Date from the SmBus driver: 10/12/2005 & WHQL 02/01/2006

Do NOT use the nForce v9.16 driver on nForce 4 or older motherboards