Up for sale is a 100% working Video input switcher/TV Tuner for Navigation equipped Titans. The unit is approx. one year old and include an S-video input along with two sets of normal RCA AV inputs. This unit is about a 2-3 hour install for the Nissan Titan, installation is relatively simple if you have the wiring diagram for the truck and have experience splicing wires. This is an older unit that currently being sold at avelectronic.com, but to get an idea of the unit quality check out:
http://avelectronic.com/NavigationVid-Switcher.htm
Here is a thread detailing the unit from this forum:
DVD on Front Navigation Display
If you have the rear DVD package you can also watch movies on the front screen in addition to the rear screen.
I'm selling this item for $350. Email
adam@tritonlabs.com for details.