i have an 06 SLT with the regular cd player head unit. i will be upgrading to an 06 factory 6 disc changer from an infinity sytem. my question is, what will have to do to do this upgrade? can i just pull out my single disc head unit and throw in the 6 disc? i'm guessing i will have to do some kind of wire harness upgrade but will there be anything else. im not really familiar with all the stereo/electronics lingo so break it down for me. thanks in advance guys!