PM me if you still need help... um... I was thinking about a similar problem... but what items are you trying to avoid using? jw...
Step 1: Put back normal settings. Step 2: Us Fence Walls. Step 3: Place windows in between some of the fence walls. Assuming the level isn't simply flat, they should be able to shoot over.
I did the King of the Hill thing. It's a small strip in the middle, when you pass through you slow right down and can't do any damage and you lose 6 points. The map is finished. Just needs tweeking. It's SOOO fun. List youe tags here and I'll starting testing it with ya'll. Cheers.