http://www.stormcam.org/gps-garmin/
Does anyone know of a good inexpensive place to get updates for my Garmin Gps?
The software updates on Garmin sites are nearly as much as I paid for my GPS.
There is an article in popular science about adding maps from mapquest:
http://www.popsci.com/gear-%2526-gadgets/article/2008-09/go-your-own-way
try that, otherwise, buy the expensive maps.
Garmin Nuvi 255 GPS