Here are some free Garmin maps which work if your unit has an external SD card (Garmin 60CSX for example). The roads and walkways are routable, but do not have house numbers to use as a target address. The POIs are also not typically found in the POI search. This Garmin map will be periodically updated
To put this map onto your GPS follow these instructions:
There will be periodic updates made as new data becomes available in OpenStreetMap.
Let me know if you have any questions. Mike bikeoid@greenvilleopenmap.info