Now the new developer Joachim Wiedorn (aka "Joo Martin") supports this project. He have made the next published versions since 0.5.2. You can found the newest versions for download under sourceforge.net.
The next versions of Transcode and ImageMagick had required some patches to dvdwizard. And Joachim Wiedorn (aka "Joo Martin") added some options: -W to define pause, -ar to change aspect ratio for each titleset (4:3 or 16:9).
The current version 0.5.6 (Feb. 2009) works with ImagMagick until version 6.4.9-6 and with Transcode until 1.1.0. All versions you can found for download under sourceforge.net.
You can look to the changelog to all changes of dvdwizard.