is it possible to bypass the stock system with the navigation system for the system to play dvd cd's in the dvd rom? what are the possible ways i can do to play dvd movies off the navigation screen besides buying a dvd player and just connecting it to the navi screen?

 

I heard you can do it fairly easily with the stock from the salesmen at nissan, but he didnt know how and it could be bs, anyone have any clue???