Hi,
I find that the best GPS software avaialable is Pocket Map Viewer. I am a Malaysian and GPS software is limted here, especially when it comes to maps. Pocket Map Viewer however allows the use of maps generated by the Garmin GPS devices, and because of the sheer number of users around the world that uses Garmin, there is a wide variety of free maps.
The app is shareware, and is available at this url
http://pocketmv.homeip.net/
Resources for maps can be found at the following :-
Various Countries
http://mapcenter.cgpsmapper.com/catalogue.php
Mid East
http://www.geocities.com/alipoland
Caribbean and Japan
http://rwsmaps.griffel.se/
Pocket Map Viewer is also avaialable for the HPC 2000 OS. Try it out guys!