need1234

hi all i just had a quick question i searched every where on the internet and no luck i just bought a AVIC 80dvd slave unit ( perfect working condition ) i have Avic d1 touch screen how can i use the 80dvd with d1 not for naviagation but for watching dvd my buddy had it hooked up with this avh 6500 unit for nav he just bought a n3 any tips plz thanks malik