The library functions will be available soon. You will be able to package any node (material, environment, etc.) into a prepackaged node and redistribute. This will allow for much flexibility and speed so that you can create (or download) these and quickly apply them to your scene.

To assign the materials, click on the surfaces in MOI3D and then assign a "Style" in the Beta 2.0. Styles were not available in MOI3D 1.0. You can see the basic colors that I assigned in the MOI user interface and they carried over to Octane. I then just adjusted their characteristic in Octane.