$db = XenForo_Application::getDb();
$db->query("
INSERT IGNORE INTO xf_content_type
(content_type, addon_id, fields)
VALUES
('node', 'XenForo', '')
");
$db->query("
INSERT IGNORE INTO xf_content_type_field
(content_type, field_name, field_value)
VALUES
('node', 'moderator_handler_class', 'XenForo_ModeratorHandler_Node'),
('node', 'permission_handler_class', 'XenForo_ContentPermission_Node'),
('node', 'sitemap_handler_class', 'XenForo_SitemapHandler_Node')
");