Ok...i figured out to get back the old ragdoll animation. I edited the "ragdoll_impusle_multiplier" value in the "native_parameters.xml" at Modules/Native/ModuleData.
I edited it to a value of 1000.0 (cause i don't know the value-range and want to make sure the ragdoll-animation is activ every time i hit or kill a npc).
What i wasn't able to got working was the "flying-effect" i changed the speed, and the weight of the javelin, my mount an my player...but wasn't able to got any of the npcs "in the air"/drop back by the force of the javelin.
Any ideas, someone?