Is it possible to bring in a new non-humanoid NPC to SP? Something like the mine monsters from JK2, or a taun taun? I'm thinking you can't, but if you could, what would you need to do? For instance, is there something specific you have to do with the model's skeleton?
As far as animating and the skeleton it's the same as if you were compiling say a walker type vehicle but you'd be constricted to what classes there already are.