I’m probably missing something unless it’s really not possible, for some reason I can’t get my function to only execute on the new and edit page of a custom post type (the new not being a problem):

I’m currently using:

if ((isset($_GET['post_type']) && $_GET['post_type'] == 'events') || (isset($post_type) && $post_type == 'tf_events')) {
    add_action('admin_init', "admin_head");
}

However this only works for adding a new post where the URL is:

/post-new.php?post_type=events

But for editing a post it doesn’t work, where the URL is:

/post.php?post=12&action=edit

(although the post type isn’t added to the link attribute)

WORKING CODE (See Mark’s response below):

// 7. JS Datepicker UI

function events_styles() {
    global $post_type;
    if( 'tf_events' != $post_type )
        return;
    wp_enqueue_style('ui-datepicker', get_bloginfo('template_url') . '/css/jquery-ui-1.8.9.custom.css');
}

function events_scripts() {
    global $post_type;
    if( 'tf_events' != $post_type )
        return;
    wp_deregister_script('jquery-ui-core');
    wp_enqueue_script('jquery-ui', get_bloginfo('template_url') . '/js/jquery-ui-1.8.9.custom.min.js', array('jquery'));
    wp_enqueue_script('ui-datepicker', get_bloginfo('template_url') . '/js/jquery.ui.datepicker.min.js');
    wp_enqueue_script('custom_script', get_bloginfo('template_url').'/js/pubforce-admin.js', array('jquery'));
}

add_action( 'admin_print_styles-post.php', 'events_styles', 1000 );
add_action( 'admin_print_styles-post-new.php', 'events_styles', 1000 );

add_action( 'admin_print_scripts-post.php', 'events_scripts', 1000 );
add_action( 'admin_print_scripts-post-new.php', 'events_scripts', 1000 );