It's really quite easy.  Create your material file in the Material Room and save into the Library.  Navigate to the material folder containing your .mc6 file, make a copy and open it with a text editor.  Wordpad works just as well as CR2Editor.  Go to the line mtlcollection and change it to figure.  Save the file, not 'Save as'.  Next move the file to the pose folder and change the extension to .pz2.  Done.  Create a .png thumbnail with the same name to complete the Mat file.  Check that it works correctly, then go back and delete your original .mc6.