I discovered how to access the navigation features (normally unaccessible while driving) with a simple few screen prompts.
1st touch the 'Menu' button
2nd touch the 'Volume' button
3rd touch the top left corner of the screen, then the bottom left corner, the top left corner again and finally the bottom left corner.
This will get you to the service screen where you can press and hold the 'Override' button until you here a beep.
Hit the back button a couple of times to get to the normal screen and away you go.
You can do all the things that you can do while in park (except while driving).
Each time you start the car again you will have to do this but it is worth it.
Let me know how you like it.