Well, I'm having a lovely time dealing with Zerg AI.
I need zerg AI to continually attack the players, I've used every AI in the book. But the zerg still aren't attacking the players, or building for that matter.

Set up:

Zerg base:
Hive
4 Drones
A lot of minerals [Because the AI requires Resources]
50k Vespene Geyser [see minerals]

I run the script "Zerg Campaign Insane" at a location that covers the hive of the zerg base and nothing else. Supposedly the zerg are supposed to build up armies, and attack bases in an effort to secure resources [I did this by hiding minerals in each town. You can't see the minerals, but they AI should want to expand at these minerals right?

Anyway, the zerg AI sits there and does jack all.
It won't put an extractor on the vespene [I tried making an extractor rather than vespene. It was ignored]
It mines minerals
Makes a spawning pool
Makes 1-2 hatcheries
Makes 2 zerglings when you attack the base.

What am I doing wrong?

Zerg Campaign Insane AI should work fine.
Maybe the zerg player is not set as zerg in the scenario - map description dialogue.
Also you should execute the ai script in a location at the players start location/starting hatchery.

If you want the comp to harass a certain area you should also run the ai script "value this area higher".