Ok, so after many topics about upgrading my computer, and lots of feedback and comments and research, I have decided on a final "set-up". This upgrade will probably be done in two parts to make it easier to pay for. Anyways, here it is. =) :

Intel Core 2 Duo E6600
Intel DG965WHMKR Socket 775 ATX Motherboard, because mine isn't compatible with the new CPU
EVGA GEForce 8800 GTS
Corsair 2GB RAM

So, that is what I'm hoping for. This is going to be a bit of a lengthy process, which is why I've put this much research and effort into it. I'm not very knowledgable when it comes to computers, so any feedback is appreciated.

As a sidenote; the only thing I've ever installed in my computer was my wireless adaptor, so I think I'll need some help putting it together. =/