hi i just tryed a experament and it worked

1.go to torybash (any version) to data then to mod

2.lets take an a example like simplecar go on it whith notepad

3.you shuold see a list of what things are their

4.body env_obj 1 ... then go to were it ses material steel and mass 0.1 betwen them say bounce 100

5.save it and go toribash and try simple car you shuold start buonceng on the car

LOL