The model format supports surface groups so u can join several surfaces to make up one object in the model. i.e a cupboard body(made of serveral surfaces) for one object, and the door for another. Or a bookcase with books (each book being a seperate 'object' but belonging to the same model. Like a Prefab).
Jointwise only the hinge is currently supported.
Supported collision types for the surfaces and surface groups are: Square, Sphere and Convex Hull.
Images:

Chest/Box with books inside

Table that can fold in on its self to save space in the room

A screen of the folding table in the editor, showing the joints
Demo:
- UNM_Demo 967kb (approx)
2 test levels are included. (BookcaseTest and UNM_Test) NM Editor not included.
Note: Textures for the models are not included since i used Return To Castle Wolfensteine textures.
Demo Usage:
W,S,A,D - Forward, Back, Strafe Left, Strafe Right
Space - Action (won't do anything with this demo)
Left mouse + drag - Move view
Right mouse + drag - move object (i.e the models, or there joints. Try to close the folding table fully)