Came across a 2005 Grand Caravan at local junk yard with the overhead rail system and in-dash DVD system. The main head unit is missing, but the wiring harness, dvd deck, and all the upper rail system components (wiring, screen, etc) are intact. Is this something I can use without the main head unit? Would I be able to splice the dvd screen and/or player into a different system? Or better still, would this work with my 2000 Chrysler Voyager OEM system? I'm sure it wont, but thought some knowledge may be imparted by you all-knowing gentlemen/ladies!! Thanks for any help and schematics would be awesome if anyone has them available!!

Joseph