yes but you have to rig the model in open brf, just extract the original man_body as a rigged model, than copy it in your new brf where your new model is, than copy it again and select paste rigging for your new armor.
unrigged models are .obj
rigged models are .smd
PS: can u help me with my thread (http://forums.taleworlds.com/index.php/topic,210379.0.html).