You can see my problem in the image:
My mesh ist deforming like crazy and I dont know what to do to fix this. Would be geat if you woud have a solution for this.
It seems that your ragdolls are not correctly set, you should set your ragdolls in Maya or Phat.
Check out tutorials
If you want to figure out which rigid body are wrong set, you can set the Physics Type to Kinematic and see if other rigid body act right.