Are you talking about MassFX (which uses PhysX)? It's been mentioned that Parameter Manager lets you bulk edit properties on similar objects. Maybe you can try that. http://www.neilblevins.com/cg_tools/scripts/3dsmax/soulburnscripts.htm
This might be faster than setting that up. Setup one object the way you want, then select the other objects, and run the script. It will copy the properties from the first selected object to to the rest. There is no error checking so make sure they are all the same type of object. --//COPIES PROPERTIES FROM THE FIRST…