I emailed Garmin asking how you get the 478 to scroll the address numbers like it does on the SPIII when you are driving down the road. Well, I received a answer tonight. The SPIII is the only Garmin unit that has ever done this. They are going to forward to the software guys to see if there is a simple fix so other Garmin units will be able to do this. Well, we will see if they do indeed come up with a way to watch the address #'s scroll by as you drive down the road.