How To: Set Featured Image w/ Custom Post Types?

Hey All..

I have a page called Recipes and set a featured image for that page (using it as a header). I created a custom post type to add recipes. The header image comes up fine for the page, but once I click on the individual post type, it resets to the default header image (as it should).

Right now in header I have

<?php
    if(has_post_thumbnail()){
        echo '<div class="art-header-jpeg-without-image">';
        the_post_thumbnail('full');
        echo '</div>';
    } else {
       ?> <img src="<?php bloginfo( 'template_url' ); ?>/images/slider-1.jpg" alt="Slider" title="Slider" />
 <?php    }
?>

But I’m not sure how to set the featured image for the single page.