You dont need to know how to script to use a script!
A big amount of buttons you press in max could be considered script. Did you have to know how to script to use them?
Its literally a case of dragging and dropping the right file into the right folder so you can once again find the polygon counter in the utilities tab. You dont need to know a thing about scripting.
At a glance in my max 8 dir’s I would say Macro_PolyCounter.mcr is the script for it for obvious reasons. There may be some UI files to go with that. Im not sure.