Newton only returns the transformation matrix. From this matrix you can read the position and rotation of a mesh and transform your own.

The implementation is very easy. I use it within my own engine! My engine is based on Omega DX9, also using Clootie's headers.

Take a look at the newton site:
http://www.newtondynamics.com/

And here you can find the Delphi header for newton:
http://newton.delphigl.de/