Wordpress | Custom post types

gistfile1.txt

/* ==========================================================================
    If you are a big fan of keeping your code base clean, you can place 
    the code below in the functions.php for custom posts single template
========================================================================== */
function get_story_post_type_template($single_template) {
    global $post;
    if ($post->post_type == 'story') {
        $single_template = dirname( __FILE__ ) . '/page-templates/single-post-templates/single-story.php';
    }
    return $single_template;
}
add_filter( "single_template", "get_story_post_type_template" ) ;