If you have install issues, just go here WITH YOUR BLACKBERRY HTML BROWSER:
http://wap.mgmaps.com/mgmaps.jar
For some reason the wap site doesn't always work (invalid jar file error).
You cannot move the maps around by design it seems. That would take a lot of bandwidth that our blackberrys do not have. You have to use the search feature to find stuff.
I've found the program to be really cool, but very very slow. It takes forever to search and download the maps!
EDIT:
Wooo!
This was my 50th post