(I don't know if this would belong to "third party tools", but I try it here)

I noticed that many users use the newton physics plugin.
As they seem to work smoother and better than the ODE in gamestudio, I'd like to use it too.
Do they give that away for free or would I have to pay money for it?

it's free.
http://www.newtondynamics.com/

you can find som sort of license in their site i guess.

edit: here : http://www.newtondynamics.com/SDKLicense.html

its free, and its plugin is also free :)))

How do we add this engine on to 3D GameStudio?

VeT has an awesome thread at lite-c contributions, with a lot of working source code.

thanks, Quadraxas

Thanks for the answers, will get it now!!!