This script is a simple script that will destroy an entity using a trigger zone. It won't make barrel explode it will just make them disappear. Place this as your main.fpi for the entity you wish to get rid of. Then in your trigger zone use plrinzoneactivate.fpi and make sure you put ifused= entity name and you will get rid of thatentity when you step in the trigger. Hope this help some people.
;Artificial Intelligence Script
;Header
desc = immediately destroy
;Triggers
:state=0:state=1
:activated=1:destroy
;End of Script