I have upgraded to a Garmin 2597 and the few school zones that are already loaded to the internal memory when I bought it actually do work in the school zone hours for NSW schools times. It also flashes a red banner across the top of the screen. But...not all schools are covered by this.
So I downloaded the extra NSW school zones from the Education section on this site and now I have all the local schools on the memory card in the unit.
My problem is that the school zones on the memory card now alert outside of school hours.
How do I edit these files so that they act like the ones provided by Garmin when I bought the unit?