First of all I’m sorry if I have posted this in the wrong forum. I have made my first attempt at creating a CAS screen using Mike’s tutorial. I installed in into my game and everything has worked fine, but for some reason not all the walls are showing up. The walls are there but they are in the down position. Has anyone else had this problem or does anyone know what my problem could possibly be caused by? I have attached pictures to show the problem. Thanks!!

Probably it's the same things that happens when creating commercial lots: the game remembers the last "position" of the walls. You should bring the walls in the "up" position before saving the lot.
Mind that I've never followed that tutorial: I'm only guessing.

Thanks Numenor! It works fine now!

Problem solved, then!