The 2008 navigation on the 2008 Prius is annoying beyond belief. I think because it was engineered to be studied like learning chinese they infused too many safety features to protect them from some kind of liability. Is there a way to disable it and or use the telephone and address book whle I have bluetooth on? What is more dangerous using a cell phone address book when driving or a large screen monitor in the car? My wife and I take trips together and having to stop to use this GS system is a pain in the rear.