Thanks to the answer..the count is quite high , the next will be aroud 3000 with a more complex skeleton.
They can move the jaw and now have a death animation.
http://www.youtube.com/watch?v=QnD4A2DhrvYSince I don't know Cscript ( have no time for learning) , I still have to organize the frames : the sequence is right but it looks that the damn things don't move in the proper manner, then a meelee combat ( they try to ripped me with the claws and I shoot at them) and a gibs explosion ( think Quake , Kingpin).