I’m not 100% sure whether the gpx files created by Garmin GPS devices work directly with other brands of GPS devices (don’t have one to test), but the following template should work as a backbone of home made Waypoint GPX files with any device that accepts standard Geocaching GPX files.
<?xml version=”1.0″ encoding=”UTF-8″?>
creator=”GPSBabel – http://www.gpsbabel.org”
<wpt lat=”66.400000000″ lon=”25.800000000″>
<cmt>Should work with anything
Just copy the text, and paste it into any text editor.
You can freely change the values of latitude ( lat=”66.400000000“), longitude (lon=”25.800000000“), and elevation (<ele>0.000000</ele>), as well as the name (UnivTemplate), comment (Should work with anything), and symbol (Geocache).
The symbol “Geocache” should work with pretty much anything, other symbol names may be device dependent.
Save your new creation as .gpx file, for example “YourNameOfChoice.gpx”, and copy it to where ever the gpx files are located in your GPS device.
Good luck with your own custom gpx files!