I'm trying to set up a copyright agreement for someone who wants to use existing text material in both a text and an aural form, online. What is the best way to state - to the people who are submitting their text work (authors) - that the copyright to the text file remains theirs, but the copyright on any new material that is derived from their work (made by us) is not?
Could you explain a bit more the situation you're dealing with? Are you basically trying to get the copyright holders to grant their permission to create derivative works?