-require_once('admin.php');
-$title = __('Add New Post');
-$parent_file = 'edit.php';
+require_once('./admin.php');
+
+if ( !isset($_GET['post_type']) )
+ $post_type = 'post';
+elseif ( in_array( $_GET['post_type'], get_post_types( array('show_ui' => true ) ) ) )
+ $post_type = $_GET['post_type'];
+else
+ wp_die( __('Invalid post type') );
+
+if ( 'post' != $post_type ) {
+ $parent_file = "edit.php?post_type=$post_type";
+ $submenu_file = "post-new.php?post_type=$post_type";
+} else {
+ $parent_file = 'edit.php';
+ $submenu_file = 'post-new.php';
+}
+
+$post_type_object = get_post_type_object($post_type);
+
+$title = $post_type_object->labels->add_new_item;
+