I am using it since it came out and I am very happy with it. The scene manager changes the nodes in your scene - it does not change anything else in Poser or anywhere else.

For example: If you want to disable the ambient channel on a figure, you select the figure in the scene manager (it works on the current scene, so you have to load the figure with its materials), then (in this case) "Disconnect node", then select ambient and press OK.

You can choose to have it removed (set to 0) or have a math node connected with a value of 0 - this way you do not loose its original value.

The script can be started from the scripts menu or from the main Advanced Render Settings menu. The ARS itself has some nice features as well, but that is another matter.

Try it, it is really worth it