This week's giveaway is in the EJB and other Java EE Technologies forum. We're giving away four copies of EJB 3 in Action and have Debu Panda, Reza Rahman, Ryan Cuprak, and Michael Remijan on-line! See this thread for details.
It stores the layout in a "PRPT" file, which is similar to the open document standard used in OpenOffice.org. The definition of the XML files inside the ZIP file are defined in the book, so you could open up the PRPT and modify the report directly. We recommend using the Java API to do this manipulation.