the cable should come with the gps. i use http://www.gpsinformation.org/ronh/g7towin.htm. To upload the tracks from the gps to animate the tracks get http://www.topofusion.com/ it is free and you can run up to 3 tracks at the same time http://www.youtube.com/watch?v=mt4Qc2IQMLg

to edit the tracks go with the http://gpsactionreplay.free.fr/ software you can take out any individual track point

i don't like the 301 because of the battery cover. one more thing water can get in. the 201 is all sealed.

bernd ny nacra5.8na sc19