All downloaded small images are saved on the disk. You can view downloaded maps by Satellite Viewer Or you can combine them into a big BMP map. It supports proxy server. And you can easily get the longitude and latitude of each downloaded small tile image.
Note: The downloaded images are only for your personal purpose, non-commercial use.

It is very easy to use.

If you use Tracky or some other GPS softwares on your PDA, it is helpful for you to download cache files on your PC :)