I'm looking into converting my NAV screen into a DVD player/MP3 CD player. I know that I need a conversion kit as well as the PAC unit for audio. Also, I will be purchasing a separate unit by Microvision which plays DVDs and MP3's. I was wondering how much I should pay for all of this installed and if I will be needing any additional products to make this work.

My car is a 2003 coupe with SAT button free and the connector available in the back. I live in the LA area if that makes a difference. Maybe someone can also recommend a shop that can take care of this for me.