Where to get Asus A8v x64 SATA Driver for Windows Server 2003

I looked this up on google and I thought I found the driver that I needed, but when I slipstream it into the x64 Server 2003 CD and try to install the OS onto my ASUS A8v motherboard, I get an error still that the driver viasraid.sys is not compatible. I don’t know where else to look. Does anyone know of a good source for this?