If you're running all aftermarket, I'd say rewire the car. Just run your speaker wires off the headunit, or better yet, get a 4 channel amp to run your interior speakers and run rca's from your headunit to that amp, then speaker wire to all the interior speakers. That's what I did and it wasn't that bad. You just have to remove door panels, the rear seat, the side panels in the rear seat, some door trim, and the kick panels. When you remove the stock radio, there will be two connecters, I think. One is for your power, ground, etc. and the other will be all your speaker wire. You need a harness adapter, you can get it all wal-mart or whatever. All you need is the one for the power, since you will running your own speaker wire. Hope that helps.