There are many tutorials about this, but I decided to have a go at writing a very brief how-to. These methods described can be used with my boxes or any other pose boxes.
The main problem you may have is trying to get these to look as the pictures do. When you position two sims close to one another, one sim may fly off and be up in the air... to get the poses to look the way they do in the picture, you must use an omsp along with your cheats.
( Quick how-to! )