If you haven't already paid for a map you can download a free map for your Garmin GPS receiver on the following webpage
[
link to site hosting free map for garmin]
The creator of the map has been posting news on updates on a Geocaching website with some instructions [
link]
The map is created using OpenStreetMap, a map which anyone can edit, and which makes the underlying mapping data available to anyone. A kind of wikipedia for maps [
openstreetmap link]. The map is not complete especially in the countryside, but its free.