KIRKBOT  GPSBabel works wonders... I've enjoyed using it to visualize waypoints and tracks from my garmin legend c in google earth (with out $ubscribing to google earth plus). GPS babel will allow you grab waypoints tracks and routes off your GPS and save them as .kml (keyhole markup language, works with google earth). Also, will allow you to load waypoints you've added in google earth to your GPS (in googleearth save a marker or folder as a .kml, then import in GPSBabel with output as GPS receiver).

A ton of GPS formats are convertable, easy to use, free, and i've had no stability issues. Enjoy!

Note: When copying to hdd, be sure to include the unix exe and the app (just copy everything over)  
(Version 1.3)

KIRKBOT  Very jumpy and cumbersome navigation with 1.8mgz G5, even with 256x256 detail setting--a shame as version 3.1 was much smoother. I find the jerkyness of the new version is almost unbearable and will continue using the old version.

Features: A lot of good stuff... just not a "5" because GPS features are crippled... use GPSBabel+ to import tracks, waypoints, etc. (4)

Ease of use: too jerky and new nav deal isn't much of an improvement (3)

Value: It's free! (5)

Stability: jerky and when the G5 has had enough google earth v4 unexpectedly quits (2)  
(Version 4.0.1694)