Route Mapping with Google Earth

I have no idea if this the right place, but I figure some pretty smart people read these threads.How great would it be if you could have a little program that just recorded your route for Google Earth? You could save them in different folders, etc., and the see your flights on a beautiful 3-D globe. I know this is possible, but I wonder if something could just do that.Well, if you think it is a good idea, I think other people would be interested in something with a small footprint that did just that.