These don't contain the magic bullet lisp you are looking for, but perhaps you could string together a couple of them, or at least get you going in the right direction.
Check out these threads . . .
http://discussion.autodesk.com/thread.jspa?messageID=1175110
http://discussion.autodesk.com/thread.jspa?messageID=2571733
http://discussion.autodesk.com/thread.jspa?messageID=1115314
good luck