Mame is also using an external .xml (./hash/) file for its 'database' while FBNeo needs to be recompiled :-/
I managed to get Xeno Crisis to work in FB Neo but i suspect it's because it has already been recomplied and not because the .xml file was updated with the correct attributes? XenoCrisis came with a sample xml file. I thought maybe I could just create an XML file for Double Dragon One to make it work?