hi Pete

you wanted to know how to animate tracks and the put them up on youtupe

1. i get the tracks of my GPS with "g7towin" and save it as a .gpx file.

2. open the track with "GpsarPro" (i paid for it, it's that good)and fix the track points that are off the chart (i did not go 50kts ). it also gives all the speed results like best 10sec, 500m.... than i resave the track.

3. load the track into "TopFusion" where you can animate the track with a map like this www.youtube.com/watch?v=IlUtFU321aA

4. that's the tricky part to get a video from the animation.
i use "CamStudio.org" to capture the animation as a video the software is not great but it works.

hope the helps

you can always goto "connect.garmin.com" and upload your tracks. they have animation and maps to. http://connect.garmin.com/activity/42612803