Internalize Plugin Template

Hello,

I dived into Custom Post types this week and made myself a nice neighborhood listing module. My functions.php file is getting a little lengthy, and I plan to port this code into other sites I create, so I decided to make it into a plugin. I created a hierarchical custom post type, and turned “has_archive” on. Everythings working great, and I have 2 templates that control the archive page, and one for the single page (archive-neighborhoods.php and single-neighborhoods.php). These templates work just fine from the theme’s folder.

My question is, if I wanted to move these 2 template files out of my theme folder, and into the plugin folder, so that I can just install the plugin into other sites without having to move the template files into the folder, how would I go about this?

This is the code I tried to use to pull in the single page template, but unfortunately it did not work, and i’ve been scouring Google for days and just can’t seem to find an answer:

add_filter('single_template', 'my_custom_template');

function my_custom_template($single) {
    global $wp_query, $post;

if ($post->post_type == "neighborhoods"){
    if(file_exists(PLUGIN_PATH. '/single-neighborhoods.php'))
        return PLUGIN_PATH . '/single-neighborhoods.php';
}
    return $single;
}

I need help figuring out that as well as the archive page. Any ideas or direction with this would be most definitely appreciated..