Originally Posted by MTS

Here's a pathetic - repeat, PATHETIC - example of how you would do it.

But you can see the different sections that you would draw on the picture. The only rule is (if you're PP) you have to have straight lines.
And even that's bendable. haha. :roll:

You take it section by section by section. And you break down to as many as you - YOU - want to handle.