1. Clik Maxscript / Run Script and choose wherever you downloaded this file to
1a. It will seem like nothing happened but that's exactly what it should do - you now need to assign a shortcut to it
2. Clik Customize / Customize User Interface / Keyboard (tab)
3. Change the Category to 'CG_Tools'
4. Clik 'Copy Objects to File' and change its Hotkey to something - maybe Ctrl+Shift+C .Clik Assign
5. Clik 'Paste Objects from File' and change its Hotkey to something - maybe Ctrl+Shift+V. Clik Assign
6. Clik Save and save your custom UI settings to a file - do yourself a favor and don't use the default.
7. That's it.