OK, I thought of a way to make it more convenient if the NAV system doesn't already do this. Have a way to store frequently used destinations; home, work, grocery store, in-laws, etc. On second thought, forget the in-laws. This way when you enter the car the NAV system can prompt you for start and end locations. If you go a different way than the NAV system sends you then reprogram the route (haven't worked on the interface yet) so it knows that this is the route you take from home to work. I go several different ways to keep from being bored. It would just have to have the ability to prompt you in those cases for start, end and route with the route stored as route 1, route 2, etc.

Toyota, need any engineers? I'm available. (for the right price)