class Bootstrap extends Zend_Application_Bootstrap_Bootstrap
{

protected $_front;
protected $_view;
(...)

protected function init()
{
    $this->bootstrap('view');
    $this->bootstrap('FrontController');
    $this->_view = $this->getResource('view');
    $this->_front = $this->getResource('FrontController');
    (...)
    $this->_redirector('/');
}

protected function _redirector(path)
{
    $response = new Zend_Controller_Response_Http();
    $response->setRedirect(path);
    $this->_front->setResponse($response);
}

}