CakePHP ErrorHandler+Smarty

<?php
class AppError extends ErrorHandler {
	private $_method;
	private $_messages;
 
	public function __construct ($method, $messages) {
		$this->_method   = $method;
		$this->_messages = $messages;
		parent::__construct('error', $messages);
	}
 
	public function error ($params) {
		$this->controller =& new SmartyController();
 
		if ($this->_method == 'error') {
			parent::error($params);
		}
		else if (Configure::read() > 0) {
			call_user_func_array(array(&$this, $this->_method), $this->_messages);
		}
		else {
			$this->_method = 'error';
			call_user_func_array(array(&$this, 'error404'), $this->_messages);
		}
	}
}
?>