We just posted the latest build to the site and two significant improvements are included. The first is that Postal Codes are supported (use caps when entering) AND the back (IE do you want to exit) is now in (thanks to everyone who mentioned this.)
Application is at:
http://www.pdazip.com/golftraxx_blackberry.zip
How to's for mapping are still at:
http://pdazip.com/MappingCourses.pdf
http://pdazip.com/MappingExtras.pdf