There is not much difference in the way I use bricks, except that I use one that is broken on an angle.
Before I add lit coals
After I added coals
For long cooks, I use a ring of expanded metal, with one of the broken bricks as a spacer.
I add 8 to 10 lit coals up next to the brick, you can kind of see them as light gray to the right of the brick. I have an old stainless steel pot without handles that I use as a drip pan in the middle.
I don't have a picture, but for quick and hot cooks I use the ring as a fire ring on steaks and such.