Quoting Rick from a question I asked :
"Basically, I added a div with a custom class name in the header:"
<div class="header_graphic">
</div>
"And then in the Extra Properties for each stylesheet, I define the image to use and it's height. Looks something like this:"
.header_graphic {
background: url(/site_images/header_custom.gif) no-repeat 50% 0;
height: 98px;
position: relative;
}
