I think that an easy way (well, relatively easy way) to learn hyper walls is to open Dinonykos default wall template and his hyper wall template. What you want to look at in particular are the letters that each wall is labeled with.
A in the default template corresponds directly to A in the hyper template. The extra space in the hyper template is relative to the walls position in the 3D view - for example the front wall, close up (wall E) has space on both sides of it because in the 3D view it has space on both sides of it. (The space above and below is for exactly the same reason.)
All clear now?
Keep asking us and we'll keep trying to explain it, and I bet we can come up with some graphics if need be.
The templates...are in a thread here someplace...OK, I'll add mine to the post here.