Please remember that you use this software at your own risk.  Further details of usage in readme.txt


System Requirements


You must have the following to be able to view and download this data to your Garmin GPS Unit

- PC with Windows XP, Vista or 7

- Approx 406MB free Hard Drive Space

- A LICENSED version of Garmin "Trip and Waypoint Manager", "MapSource" or "CityNavigator".  (Trip and Waypoint manager is bundled with Garmin mapping units, and updates may be available for download from the Garmin support site http://www.garmin.com).   There is also a legal way to download this software detailed here on the Yahoo Mapauthors group

Some users have reportedly been able to use shonkymaps on other operating systems without MapSource (such as Linux) using products like SendMap.  Refer to the gpsaustralia forum for details.