No sound while using Windows 2000

[MR.TEE]

I just re-installed my pc to Windows 2000 and I can't install the sound card and it's very difficult,because I dont have the software but I do. It's a Realtek HD audio codecs but another problem was that I tried to install it but then it says to have a Service Pack 4(which I dont really freakin get)

My Desktop is a Compaq Presario SR1303WM
AMD Sempron 2.GHz
256 RAM
thats all I know for my pc specs.

[pip22]

http://www.microsoft.com/windows2000...4/default.mspx

[MR.TEE]

Thanks for the link.