What are you saying? You said you have never built a computer before or somehting, but you bought a DFI Lanparty? What are you doing? honestly I think you should try to go for a low end Athlon 64 for s939, they have some good deals, and don't buy that old stuff. It's yesterdays news, there's no reason you cant use the new stuff. If you are mainly using this computer for average things then use a motherboard with integrated video(ex. Geforce 6100 chipset).
Here is agood athlon 64 3000, and a good motherboard with integrated video.