lots of us have done it and there is tons of info in here already if you do a search. the stock head unit does not have RCA outs but it does have line level outs (since the amps are not in the headunit but at the speakers). if you've never done a stereo install yourself, i wouldn't start now. it's not hard to hook everything up but doing a proper wiring job is a real pain in the butt. you can choose from a bazillion components, but for a simple setup, i'd look at replacing the door speakers with a set of two way components, the stock sub with one of the premade fiberglass boxes and look at what others have used for subs with these boxes, and a 3 channel amp with a built in crossover.