/** * Retrieve shipping carriers for specified order * * @param Mage_Eav_Model_Entity_Abstract $object * @return array */ protected function _getCarriers($object) { $carriers = array(); $carrierInstances = Mage::getSingleton('shipping/config')->getAllCarriers($object->getStoreId()); $carriers['custom'] = Mage::helper('sales')->__('Custom Value'); foreach ($carrierInstances as $code => $carrier) { if ($carrier->isTrackingAvailable()) { $carriers[$code] = $carrier->getConfigData('title'); } } return $carriers; }