Oblivion came with invisible cubes of assorted sizes to use for triggers, but with FO3 they introduced the cubic activator. The new system does have some advantages, but I don't see any way to PlaceAtMe a cubic activator. You have to draw them in the GECK before even deciding what their base object is. Is there a way, or can someone provide a set of invisible non-movement-obstructing cubes as a modders resource?

The time I tried to do this, it did not work well. I pre-created a trigger with a REF and moved it around. It simply didn't trigger reliably enough to be usable.

What is it that you need to do, exactly?