my website is http://www.postgraduatesinsport.com/
the header of the site is a white background.
i want to add the image http://www.postgraduatesinsport.com/wp-content/uploads/2010/04/header960x100.jpg as the background for the 100px high header.
how do i do this and will the logo, search box and 468 banner be in front of it or not? i want the image loaded to be the background with the logo, search and 468 as a lyer on top.