Here is only a sample of what and how this can be accomplished and this is placed where you want this - tpl_header.php or possibly tpl_main_page.php if you want this outside of the header area
Code:
<div id="navigation">
<!-- Begin Search --><div id="search">
<div id="searchbox"><?php require(DIR_WS_MODULES . 'sideboxes/search_header.php'); ?></div>
<!-- End Search --></div>
<!-- begin top navigation -->
<div id="navMain">
<a href="index.php"><img src="includes/templates/floor/images/spacer.gif" alt="Home Page" width="96" height="44" border="0" /></a>
<a href="index.php?main_page=login"><img src="includes/templates/floor/images/spacer.gif" alt="My Account" width="114" height="44" border="0" /></a>
<a href="index.php?main_page=logoff"><img src="includes/templates/floor/images/spacer.gif" alt="Log Out of My Account" width="89" height="44" border="0" /></a><a href="index.php?main_page=shopping_cart"><img src="includes/templates/floor/images/spacer.gif" alt="Shopping Cart" width="131" height="44" border="0" /></a>
<a href="index.php?main_page=checkout_shipping"><img src="includes/templates/floor/images/spacer.gif" alt="Checkout Now" width="106" height="44" border="0" /></a>
<!-- end top nav --></div>
<!-- end navigation wrapper --></div>
This is where the hot image is part of the design and spacer.gif is a trans image placed over it