the guards are just some kind of monsters with an Action makes them do what ever they do ...
You can remove them from Cronus by removing them in Cq-generator
This Guide shows how to add monsters in a map ... understand it and you will know how to remove the guards
By the way removing them will take alot of time and alot of searching in Cq-generator so i suggest you to make the guards very weak in cq.monstertype to save time and avoid messing up Cq-generator..