short answer:

you cant.

long answer:

at this time it's still impossible (dunno about the newest update though, i ment for 6.31.4) to have a ragdoll run around and do all animations...
instead, use a plain model for that, and blend it when it's death animation comes up.
blending though is a hard part... you cant use a single model that reacts with bones on physics, you need to make every part as a different model, and hinge them, that's how i did my ragdoll, cant say anything else now except for: have fun making this, it took me one weekend to figure it out, let's see if you can do faster :P

regards,