save+Edit shipping title+name+Error Message magento

$shipmethods = Mage::getSingleton('shipping/config');

$title = "Aditya_title";
$name = "Aditya_Name";
$Errormessage= "This is shipping error Error Message";


$code = 'shipping_code';


$shipmethods->saveConfig('carriers/'.$code.'/title', "$title", 'stores');
$shipmethods->saveConfig('carriers/'.$code.'/name', "$name", 'stores');
$shipmethods->saveConfig('carriers/'.$code.'/specificerrmsg', "$Errormessage", 'stores');