OK this probably will seem really stupid .i have been reading for a while now about everyone with there stock HU problems and just my luck i got the same crap the Error 3 code flashing now i no i gotta change my head unit and i dont wanna get no avic d3 as i will go bankrupt if i do.. so im gonna go with a decent Alpine regular cd player but i wanna use the factory amp. now could i use this metra kit everyone is talking about or is that only for the stuff with navi and all that like the D3. iv been told i could just run wires right to the speakers because the new headunit will work just as well/take place of the factory amp.. ive searched this a 1000 times but just get more confused..if someone can guid me that would be good . . . .