Why do i have to have the cd in for that?

DOes the roads up date and businesses update somehow?

Anyone know of a good cheap screen protector?

I have the D3 by the way

Because all the mapping, POI information, and telephone information is stored on it

I'm not a 100% sure but I heard the PSP screen protectors are the same size.

1. The D3 doesn't store all the map data internally. The internal memory only holds one route in it's memory. You put the disk in, program in your route, and it saves it to the internal flash memory. Then you can pull out the nav disk and use the drive for whatever you want. Each time you need to use the nav you have to put the disk in and save the route.

2. Do a search on this site for screen protectors. There's a topic or two with links to where you can buy them.