I have yet to tinker with it, as i am not overly concerned, while i would like to have a rideable Dilo, going through the process modifying the Skeleton/mesh, is not worth it. One suggestions instead of duplicating the skeleton just move the core skeleton over to your MOD folder and modify that directly, then use the verify cache to redownload the core file again. More than likely you will have to do this with all core files connected to it.