It seems the struggle with noobs feelings and cold veterans is never ending. However, Red does a great job giving links and information without saying "you must search" so it is a good middle ground.
Now, for my experience, ditch the head unit if you can afford the amps and so on. IF you can't afford new equipment, then run the carPC through the stock deck for a while. It won't kill you and gives you some time with it to learn before you get to involved with the project.