how to change monster chase sound.

[FlawlessHappiness]

I tried to look but I cant really find it its not really a problem either but I would like to know if you can change the sounds when your being chased by a monster but only for one custom story so I dont want it to change it completely like if you play the main story and it has different music playing and the the terror_meter one or whatever. Any help is appreciated thanks.

You take all the monster files from the corresponding monster, copy them, open the ent in the model editor, and then just look under userdefined variables