Yes I must admit, considering the use of ragdoll would not be limited to death's, normal hits etc will have effects too. Really I am looking at areas where physics mught cause problems, namely in a multiplayer environment, and if that is the case then I would only use phsics in key areas, like post death animation, and other things. Also in a 64player map with say 100 standard physics items, how accurate is the system? what sort of variences if any can be seen? How does the engine determine priority, i.e we both shoot the same box in different directions at the same time, will it grant one over the other? Will both forces go into the calculation pot, and if so what if 3+ etc. As far as I understand phsyics there is not a true calculation yet that can accurately realise the bounce from 3 or more balls hitting together. This is a maths issue, not just a physics engine one.

So I am wondering really how reliable are any of the engines, is this something better avoided?

Anyway a new computer has just turned up so I have to oversee its delivery, lets hope their is a nice new shiny video card in there for me.....

Thanks for all your comments.