InstanceMaterial
Select a material (must be a StandartMaterial) in the MaterialEditor - then run the script.
It scans through all objects and their materials and replaces all materials that have the same name as the selected one with an instance of this selected material
Install:
Copy pb_InstanceMaterial.mcr to your uimacroscripts directory - restart Max and you will find it under CustomizeUserinterface - Category 'Piranha-Bytes'