You can obtain the source code of JMultiburn-Sermon easily via CVS. If you have a UNIX-like OS, CVS is likely to be already installed. In this case execute the following command in the directory where you want the sources to go to:
cvs -d :pserver:anonymous@zephyrsoftware.cvs.sourceforge.net:/cvsroot/zephyrsoftware checkout -P jmultiburn-sermon
If you are running a different OS, refer to your CVS client's manual and use this login data: