That site uses the Custom CSS editor to get different pictures on every page. This is an advanced technique. Under advanced settings you can click "Edit Custom Stylesheet". The CSS looks like this...
body#pages_index div#header2{
background: url(little_girl_bible.jpg) top left no-repeat !important;
}
Where "pages_index" is the name of the class attribute on the body tag and "little_girl_bible.jpg" is the name of the image that's uploaded in the CSS Editor.
You can hide the the top header by using the "Hide Titles" checkbox in the main settings.