I was thinking about cutting the parking brake ground wire behind the monitor which would allow me to watch DVDs on the NAV while driving. I spoke to a friend about it who works for an insurance company and he warned me against it. Apparently if there is an accident or even worse, a fatality, the first thing the insurance company will do is look for any modifications to the DVD player or NAV. They will look for any way out of having to pay damages. They have trained technicians who will look for these things. I never really thought about it until he mentioned it. I thought that I would pass it along.