Re: I downloaded BBPress. How do I get it to look like bbpress.org??
I don’t really understand the question. If you want to make a theme that looks like another theme, you make it. If you don’t know how to, you either learn how and hopefully contribute what you learn back to the community via the codex or forums, or you hire someone that already knows how to do what you do not know how to do. 
Maybe I’m missing the point. I get that the documentation isn’t great right now, but it’s exactly the same as making a WordPress theme. The template files and their locations are already in the bbp-twentyten theme as an example.
Making an entirely custom theme is *not* a step-by-step paint-by-numbers thing. It’s not something anyone can teach you how to do, you have to learn it yourself.
