I'mean that you cannot apply simple 'in wall' door like in this picture. we have to find other layout, like in your samples on this page.
Hmm... sorry but I'm still not sure I fully understand your problem. Perhaps it's worth noting that the tileset is intended to look like an old 8-bit game where perspective and scale may be a little distorted in some cases.
Here is how I would do a layout like that. I did add a new tile here: the two vertical wall bricks near the door in the middle.
Would something like this be useful?