i am buying a pioneer avh-p6400 off the internet and went to 2 local audio shop to get some prices on how much they would charge to hook up the screen with a ps2,cd changer and power-inventer one said $175-225 the other one was $150 i have hook a 2 pioneer cd players in my car because i all had to do was match the colors and i know how to hook up a cd changer.i was wondering what is the different is hooking up the avh-p6400 and i regular cd player and how would i hook the ps2 up?