Yeah, your going to need a 6600 GT. Its been so long since i even thought about the normal 6600. If you want, you can create a thread about it. Just 1 or 2 questions at a time, we all can answer them very accuratly.
Believe it or not, builting a computer is rather simple. The only thing that gets me, is wiring. Sometimes its just a pain, sometimes you disconnect something wrong ect. When you get into computers, the first thing you will learn is hardware. Then how it works, and what it does. Once you learn about hardware, from what it is and what it does. Thats pretty much it. With that knowledge, you can OC and do some serious case MOD's.