Has anyone played with this unit yet... I found a few things "hidden"

1. hold volume down while switching on "cleans" the registry
2. dunno how i did it and can't find it again, but had the screen flash and come on screen with turn directions every time a course change needed to be made.
3. opened the bad boy up and found room for a headphone jack and the speaker is only connected to the board via spring contact, should be easy to add a headphone jack for the mp3 player. I'll do that next week...