Anyone tried with any success to re-purpose the NAV screen into a DVD screen? I can't stand the out-of-date software on it, and I don't feel like buying a new DVD for $150 bucks. I have a TomTom with lifetime updates for free, so I really don't feel I need the NAV screen at this point. Although if there was some way to get the TomTom to work through the factory NAV screen that would be awesome.