NickM
Veteran
- Location
- Darwin's birthplace
NickM said:...you would need Mapsource to be installed on the PC you were using to transfer files to the GPS, wouldn't you?
Further to the above, I think I have an answer.
GPSBabel will allow you to load .gpx files into a GPS without Mapsource. Furthermore, it is available as an .exe file, so you can carry it around on a memory stick along with your route library and run it to load up your GPS wherever you can find a PC. It is not the friendliest of programs, but will solve your problem, I reckon

But just in case it doesn't work, please test this suggestion before depending upon it!
PS there is lots of helpful stuff, written in a style which even I (who am techno-reluctant) can understand, here (click on "GPS", at bottom right in the blue panel)