Sorry to disappoint you from the door, but actually there is no “How to setup my site like the Pinboard sample”. It’s a reading through internet, boards, posts and readme.txt that you have to do by your own. Thats what everyonehas to go throught atm. Start and see how far it will take you and come back f you have a specific questions, hoping somebody might be able to help you.
Secondly, the header image is the same for all pages. Its suppoesed to be the name of the blog, company etc.
Cheers,
Alexander @ http://www.mouseclick.com