I known make the GOG'smonster help player to fighting are so hard ...so foget it
and the Overlord is a mod which can make a servant skeleton to help player and the skeleton can get different look(including player's skin) by use some item .
so i think can do something just let the skeleton of Overlord use GOG's model ?
it's kind like of custom npc mod . but only one funtion of change the model