Does anyone know how to modify the programming in the AVIC-Z2 to show more roads at the .5 mi and .75 mi level of zoom. Apparently some of the roads in my neighborhood change from class ? to class 4 near my home and therefore the only time I can see them is at the .25 mi zoom. This makes the unit useless when there is a problem on the road since you can't see enough area to figure out an alternative when you can see the streets, and when you reduce the zoom, all there is is a blank screen. I had an AVIC-S1 and it showed the roads, but some Pioneer tech told me that it was a mistake that they showed the class 4 roads.
Thanks.