I would just say what i always say :P, Open up Cyseal and look for a cluster of enemies and see what objects are used around that cluster of enemies. Maybe theres an area trigger that triggers the script for combat. As for adding treasure that contains loot, go into Esmareldas House (the upstairs) and view sidebar on the chest that contains the Underwear (that chest has set loot to contain only that item), you could also do it with evelynns house (the chest that contains the reveal spell or the bookshelf that contains her diary).
Have fun!
P.S i know this is kind of a 'Find out yourself' but i don't know how to do any of them. But if i wanted to know that is how i would go about finding out.
