This tutorial was published by Fatboyfun on another GPS website. I repackaged it for convenience, and present it here giving full credit to Fatboyfun. If you have an interest in mortscript, this seems like a good place to start.
If you have questions, ask fatboyfun, he seems to be pretty acomplished at this. If you feel compelled to thank someone, also thank Fatboyfun. He's not difficult to find. I hope I'm not breaking the rules or offending anyone by posting this. I've been looking for something like this for a while and just stumbled across it. Thought you might enjoy it too.