I found some free GPS tools. Not very flexible... but free!
www.gpsvisualizer.com/
It's also very good for doing a google earth overlay, shows how fast you were going where.
What are the speed units there? 
This is what I find really great about GPS-Visualiser:
(5hz track from GW-52)
Select to expand quotejimbob SA said..sailquik said...
Snap!
all I can see is lots of RED Daffy.
I think that's the walk back Jamie.
