Custom Header on Self-hosted Installation

I moved today from a WordPress.com blog to a self-hosted blog. When I did this, I lost the Custom Headers capability that my theme (Piano Black) had. I’d like a random image from my header library each time the page reloads. I’m attempting to use Dynamic Headers to make this happen.

Dynamic Headers generates a $dynamic_header_url tag that I can use in header.php, but I’m not superb with PHP and I’m not sure how to insert it. How would I insert this so it works?

Piano Black has a theme option to use a custom header. It assumes that the header image has the blog name and whatever on it, so when that option is enabled it does not show the name and tagline. I would like the name and tagline to be shown but I would like to use the random images.

Appropriate snippets of code are below.

This is the part of Piano Black that controls the logo.

<div id="header">

   <?php if ($options['use_logo']) : ?>
   <div id="logo_image">
    <h1><a href="<?php echo get_option('home'); ?>/"><img src="<?php bloginfo('template_url'); ?>/img/<?php echo $options['logo_name']; ?>" title="<?php bloginfo('name'); ?>" alt="<?php bloginfo('name'); ?>" /></a></h1>
   </div>
   <?php else : ?>
   <div id="logo">
    <a href="<?php echo get_option('home'); ?>/"><?php bloginfo('name'); ?></a>
    <h1><?php bloginfo('description'); ?></h1>
   </div>
   <?php endif; ?>

This was placed into header.php to generate the $dynamic_header_url tag.

<?php if(function_exists('dh_get_page_image_url')){ $dynamic_header_url = dh_get_page_image_url(); } ?>