You need to read your guide in your docs file. Spawning thing when something if activated is the same as the pillers. If you want to activate something like debris when one of the pillers is damaged, you have to give it the same name as the piller being activated.
So if you look in your guide it says on page 154 how to spawn an entity with a trigger. apply it to this and you are golden. very simple.
But perhaps you are like alot of people on here and you don't want to thumb thru the guide, so here you go:
Spawning enemies with a trigger zone: By Brian Lizotte
How a game plays is just as important as how it looks. Spawning enemies at just the right time in unexpected places can make your game exciting and fun to play as well as great looking.
1. In the editor, place your enemy or enemies where
you want them to appear when they spawn. Right
click on the enemy and enter the following in the
properties section:
Give the enemy a unique "Name". If more than
one, all must have the same name.
Set "Spawn At Start" to No.
Set "Maximum Spawn" to 1 (see image below)
Changing the "Maximum Spawn" number will change the number of times that the enemy spawns after he is killed.
See the FPSC Manual for other values and their meanings.
2. In the editor, place a new Trigger Zone where you
want the enemy's appearance to be triggered. Right
click on the Trigger Zone and enter the following in
the properties section:
Enter the enemy's name in the "If Used" box.
Set the AI Main script to
"plrinzoneactivatifused.fpi”.
See the FPSC Manual for other values and their meanings.
The enemy will now spawn when the player walks into the Trigger Zone. Be sure to place the Trigger zone where the player will have to walk into it, unless randomness is part of the plan. Giving the player multiple routes to travel with different results can add a longer play life to your game.