protected function checkLocalCodePool()
    {
        $helper = Mage::helper('aoe_scheduler/compatibility'); /* @var $helper Aoe_Scheduler_Helper_Compatibility */
        if ($helper->oldConfigXmlExists()) {
            $this->_getSession()->addError($this->__('Looks like you have an older version of Aoe_Scheduler installed that lived in the local code pool. Please delete everything under "%s"', $helper->getLocalCodeDir()));
            return false;
        }
        return true;
    }