Dave, have a look at AI_Boats, you map out the route you want on Google earth and compile the kml from there, want to change a route, change the Google track - it's that easy
Yeah.. I have AIBT and put Google Earth on this pc for doing just that. I'm sure that when I've done one, I'll wonder what all the fuss was about but it's all too much for me at the moment In the meantime, I'm putting AIBT to good use by decompiling and recompiling files with ships I want to see. It's a very tiny first step but it IS a first step