SMF 2.1 RC3 has been released! Try it out and help us test! Read more.
Well you can actually get the template.html out of it, that has a lot of the stuff.
Which orange part do you mean?Indeed I tried to install the good old YaBB 1 Gold on my xampp but was not able to get it alive. So I am not 100% sure about every detail.
Now I know where the PB default template came from.