playing dvd cd's in the dvd rom
 

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???