Ha! I can't believe I found it in a backup. Only have the source right now, will have to re-install hammer and compile it.
On the other hand, I found another one I made a while ago, sti… ((more))
Also, Kerbal Space Program (http://icrontic.com/discussion/93074/kerbal-space-program). Although there you don't often have to worry about large plane change maneuvers as the launch site is at 0 deg.… ((more))