Hello! I really thing these scripts are neat and useful, but I'm having some troubles with this one?

I read the instructions on how to use the Fine Tuning script, and they seem fairly straight forward: input the command desired under the script function of a move event function
But I can't get this to work? Nothing seems to happen when I try this.

I tried looking at the demo to get a better idea, but none of the events appear to have anything attached to them? They're just an event. I can't seem to glean how the Event Fine Tuning map works at all.

Any help would be appreciated. Please let me know if I can explain this better. I'm very confused.