and the reason it does not have a model.glm, is because it is ONLY a reskin. which means it uses the model.glm that came with the game for tavion.....so simply copy all the files into the tavion or tavion new folder, whichever one the skin is for. then you can go look at the new skins on the model in modview. getting it into SP is a totally different story.
two ways really.....check out these threads....
one dealing with the games .npcs and console commands....
http://www.lucasforums.com/showthread.php?s=&threadid=112998)
but there is a way to have things selectable as well.....
http://www.lucasforums.com/showthread.php?s=&threadid=116050)