Have a look at this thread.
http://forum.thegamecreators.com/?m=forum_view&t=160475&b=30
Rag dolls are hard to get working, and some people say that DP cant do them properly. However I say if it looks and acts like one then what's the difference?.
My program here - look for skelly and click download, source and model are included.
http://forum.thegamecreators.com/?m=forum_view&t=159600&b=36
Shows how you could do it. It was made for a week long competition so the code is very messy, but have a look and play about, If you spend some time you might just get the effect you want.
Basically, you have to make a model for every limb then join all the limbs back together with DP joints. Very time consuming and quite hard.