post.php needs to be updated, I believe, but not sure how to add the function required…
Did it myself
Add new custom field “Featured”, enter url of image
This goes into search.php within the while loop
<h3><a href="<?php the_permalink(); ?>" title="<?php the_title(); ?>"><?php the_title(); ?></a><img src="<?php echo get_post_meta($post->ID, "Featured", true);?>" /></h3>
