Muting a monster- WARNING, SCRIPTING NOOB

[Bennick]

Okay, I have several questions.

I have a hallucination monster (the kind that disappears when you get close enough) that I want to mute so the player won't expect it when he opens the door. Is there a way that I can mute him? Also, where would I put this script? in the hps file? is that where all scripts relating to the map go?

Also, how exactly can I find out what actions are available to me via scripting and how to write them? Is there some kind of universal glossary of commands to find these things in?