When I check this out I can get the background to cover all of the content by setting the background to repeat on y and remove the height specified like this:
screen.css (line 114)
#outerWrapper #contentWrapper #content {
background-image:url("../Levy4U_MainPage2_images/content.jpg");
background-repeat:repeat-y;
color:#999999;
font-family:Tahoma,Geneva,sans-serif;
font-size:12px;
margin:0;
padding:10px 135px 10px 125px;
}
This made it so the content was all within the area of the image and not going past it.