XEGS (36 titles) all tested and seem to boot fine in current SVN.
I found it was a tricky combination of making sure you had the roms (typically for bios) and the software path in the rompath at the same time. You also need to make sure the XML for the system is available in your HASH folder. Once you get that set up, it's a matter to typing "mess xegs -cart ttoppler", for example.