Having got involved in discussions on the forum, I found that the Magic Nodes script for Media Monkey had advanced considerably since the last documentation was written. With little time to spare and without English as his first language, the author was unable to do this. So, rather than just gripe, I have put together a manual for Magic Nodes for MediaMonkey3 with the approval and being proof-read by Zvazdan, the author of the script.
At the moment it is in PDF format (but this may change) and documents the script at release 1.6.2.1. It will be updated in-situ and revisions will be announced on the forum thread.