The Creative Commons released a cool Add-In for www.Openoffice.org making it easier for you to Copywrite your Writer (word processing documents), Calc (spreadsheets) and Impress (presentations) documents. It was created by student Cassio Melo at the Google Summer of Code. It’s simple to install, and just as easy to use.
Visit Creative Commons for downloading. I downloaded it and gave it a try, it worked great.