I love this cake! Always have.
I'd say you would stack it the same way you stack others. The difference is that the pillars are more to the outside corners of the layers then in more toward the middle.
Because it would be top heavy I'd stack it on site rather than try to transport it that way.
Are you asking how to stack the cake posted on your Filckr page? It looks like you are asking how to do a cake....you've already done?