I've uploaded the code I use to support automated packaging using the Jenkins (formerly Hudson) integrated build server to VastGoodies.com. There's a lot of overlap in functionality with Melissa, but there are some important differences too, including the ability to package XD images. I started my development long before the release of Melissa, otherwise I might have built on that, but such is history.
There's some documentation embedded in class and config map comments and notes, and I'll be adding more via my blog at http://omasko.wordpress.com, including details on how I make Jenkins create packages in both Windows and UNIX environments.
You'll need the maps "Abt Image Startup" and "HQA Automated Build Support" to get started.