Select a root object with the material you want to copy. Adjust all values that you want and select the other objects. Press 'Let's go' and randomized materials are copied to the selection. Keep in mind that a simple material adds about 12.450 bytes to a MAX-file. You can choose between 1 and 64 random materials to be created. It is a heavy-duty command - so I made a progress bar at the bottom of the pull-down.