Wow, actually placing in walls etc... That's beyond my knowledge so far. But I'm going to get around to that eventually! LOL! In the meantime here is a youtube video of my most recent modifications, my second video.
It shows how I have setup some interesting things. But I searched for the walls and floor within the game but they are locked like the carpets etc. But thanks to all you guys I'm learning so MUCH! I should really go and look up who it was who posted the pictures on Steam they were helpful. Thanks Everyone.