I have a 2001 ford taurus. The connector behind my car has 20 pin. I remember reading in here somewhere that the newer ford taurus has built in ac function and shiet. But for my car, it was easy, just bought a metra adapter and you can put in any in dash cd player you want. However, I think that adapter is way overprice and it doesn't look oem. Are you plannning on keeping your original dash piece, if not, i say hack it and make an opening. And for wiring diagram, i think goracer has access to the diagram. I wasted my money buying the metra dash kit because now i don't even want it. i'm not satisfy with having just a dvd/mp3/divx player.
what i'm trying to say is that, if you think you'll be happy with having a motorized screen or just dvd player, then buy the metra kit. otherwise, down the road when you want to make the switch, it'll cost ya money.