public function addParticipatePage($label)
    {
        $participate = $this->addContainer($label);
        $subscr = $participate->addPage($this->_('Subscribe'), 'pr.participate.subscribe', 'participate', 'subscribe');
        $subscr->addPage(null, 'pr.participate.subscribe', 'participate', 'subscribe-thanks');
        $unsub = $participate->addPage($this->_('Unsubscribe'), 'pr.participate.unsubscribe', 'participate', 'unsubscribe');
        $unsub->addPage(null, 'pr.participate.unsubscribe', 'participate', 'unsubscribe-thanks');

        return $participate;
    }