I love this tool. Its made my life so much easier. And oddly enough the unreal based normals render better with realtime shaders inside 3dsmax than the default 3dsmax versions.... madness say.
You can also use python natively http://docs.autodesk.com/3DSMAX/16/ENU/3ds-Max-Python-API-Documentation/index.html http://tech-artists.org/forum/showthread.php?4257-3dsmax-2014-Python-is-out