Mapsource Map Loading Questions

[+bobkeenan]

I have two questions with respect to loading maps (city navigator and topo 2008) on to an sd card for my colorado.

 

Note that I am loading less than 2000 segments of the topo map.

 

1. Why does it take so long. If I take a 4GB non-map file to the card it goes pretty quickly. But If I try to put a 1.2GB CN and 100MB topo on it takes HOURS!!! What is up with that?

 

2. Is there a way to add a map and then add another map later and have the previous map still be there. It looks like you have to totally overwrite whatever is there each time.

 

Thanks