Zend Routes to sub-dir

Bootstrap.php

protected function _initRoutes()
	{
        $this->bootstrap('frontcontroller');
        /**
         * @var Zend_Controller_Front $front
         */
        $front = $this->getResource('frontcontroller');
        /**
         * @var Zend_Controller_Router_Rewrite $router
         */
        $router = $front->getRouter();
        $router->addRoute('www2',
            new Zend_Controller_Router_Route(
                'dn24/:controller/:action',
                array('controller' => 'index',
                      'action' => 'index'))
        );
	}