Wordpress: Display different header graphic per page

I have a live Wordpress website here (broadwellgroup-dot-com) and I need to display a different header graphic based on the top-level page that you are on. So if you are on "About Us / John Smith/ page, it would display the graphic I've created that says "ABOUT US". Right now when I create a new page it displays the default header graphic regardless of where I put it in the menu hierarchy and although I can manually change it each time, I don't want to since this is a live site that the client is using already. I believe a combination of one of these solutions I found would do the trick. [login to view URL] [login to view URL]