You don't have to do anything special.
Try this....
1.Set up an ALiVE Assymetric scenario with our modules.
2.Pick a random spot on the map and place a Custom Obj Module down and sync it to your Assymetric Commander. I always do only objective and make the composition myself.
3.Place some enterable buildings or shacks at that location.
4. Set your starting installations to EXTREME (for testing purposes) and hit preview
5. Zeus your way over to the custom objective. You'll see IEDs, Water coolers, whiteboards, inside the buildings. (not all the time, but a lot of the time and obviously based on how many installations you have it set to initially)
I discovered this a while back. Pretty great addition and allows you to expand insurgency campaigns on sparsely populated maps.