are you sure u don't?...
so what folder are your theme's images at?
anyways... once you have an 'image' folder in your current theme.. put that image in it and type this code in your header.php under <div id="page"> after the <div id="headerimg"> before the <hr/>tag:
Code:
<img src="<?php bloginfo('stylesheet_directory'); ?>/images/samc.jpg" width="" height="" border="0" alt="">
EDIT:
i forgot... if you want to have a full control on where it will show up place it in a new 'div' by making it just like this:
Code:
<div id="addedimg"><img src="<?php bloginfo('stylesheet_directory'); ?>/images/samc.jpg" width="" height="" border="0" alt=""></div>
Code:
then in you 'style.css'... add this:
#addedimg {
margin-top:400px;
margin-left:300px;
width:auto;
height:auto;
}
change the value of the margins as you please.
Gooooodluck!