I think that you may find using Guido van Robot more useful. http://gvr.sourceforge.net/ There was a good introductory talk 2 weeks ago at Pycon, but there is no paper yet here http://www.python.org/pycon/dc2004/papers/ Jeff Elkner, the author, will probably post a URL now I have mentioned it, (and yes Pycon still wants the slides). Good luck, Laura