feel your live doesnt have enough rag dolls or liqud serfaces or cloth physics well you arnser in MEQON and heres their downloadables page
http://www.meqon.com/downloadarea/downloadarea.php personly i would recomend the top two !!!
be aware 1.0hgz/256/gf3 minimum!!!! my system is great and can bearly handel the jeep demo @ max visual hehehehehhe if you have a GF5 or a ATI9550 or over try the option "all casters" in jeep demo u will love the pixel shader effects!!! be aweare thou display full screen at 640x480 for best performace with SM2.0 options turn on otherwise fps could go to 4fps !!!!
hope you enjoy!!!!