Tough Question on Walls

Level 3
Oct 7, 2009
So can anyone tell me how I would do the following in world editor.

I would like to use the model "Force wall" to build a maze. "Force Wall" will make up all the walls. Though instead of building open spaces as the path, I would like to use "Force Wall" also as an image that you can walk through as doors? Meaning you actually have to search for the path.

I've been given the idea of creating a custom unit, changing his image to "Force Wall" and setting it to "locust". Though I'd rather not add more units to a unit heavy map.