Sound driver problems with 975x V.2

Ok, my setup is
C2D E6400
Corsair XMS2 6400 C4
Freezer 7 Pro (Arctic Silver) sitting at 32C now
975x v 2.1
Nvidia 7600 GS (went cheap awaiting DX10 cards)
80 GB sata 2 HD. primary
300 GB sata 2 HD.  backup
Ultra Xfinity 500 PSU
Samsung DL DVD burner
2 120 mm case fans = 4 120mm fans total...hahaha! (freakin loud without speedfan going)
WinXP Pro 64
When I try installing the Realtek sound drivers, I get an error message saying I need the file wksproxy.ax on my winxp CD. I'm stumped. It actually installed most of the drivers, except the "audio device on high definition audio bus"
I was thinking of getting this card http://www.newegg.com/Product/Product.asp?Item=N82E16829111002. I hear for 25 bucks (after rebate) it is a steal for a DDL sound card. 
I am wondering though how much help it would be for gaming.
Thanks for any help!!!!

this is the link : http://downloadcenter.intel.com/scripts-df-external/Detail_Desc.aspx?agr=N&DwnldId=12150&lang=eng

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