There are a great many who are more expert at this than I, and no doubt they'll pitch in - but just a word of warning (which probably isn't necessary). Just because it's on mudcat does not mean it's public domain - and sometimes it's difficult to figure out!

Check out the very interesting article that was posted on the other copyright thread - http://www.woodpecker.com/articles/royalty-politics.html

Non-profit, religous, education, big fish, little fish - doesn't seem to really matter much - all are supposed to pay the piper. It reminds me of an old peom, "The Gobbleuns 'll get ya if ya don't watch out..."