Attached Link: http://www.physicalc-software.com/poserphysics/

HI, Thanks,

PoserPhysics is a plug-in for Poser 6 which enables gravity, joints and collisions ...

Check the link to there web site.

And here's the link to Content Paradise where you could buy-it.

http://www.contentparadise.com/us/user/product.php?productid=16429&cat=1325&page=1

Meddo