public function collectRatesByAddress(Varien_Object $address, $limitCarrier = null)
{
$request = Mage::getModel('shipping/rate_request');
$request->setAllItems($address->getAllItems());
$request->setDestCountryId($address->getCountryId());
$request->setDestRegionId($address->getRegionId());
$request->setDestPostcode($address->getPostcode());
$request->setPackageValue($address->getBaseSubtotal());
$request->setPackageValueWithDiscount($address->getBaseSubtotalWithDiscount());
$request->setPackageWeight($address->getWeight());
$request->setFreeMethodWeight($address->getFreeMethodWeight());
$request->setPackageQty($address->getItemQty());
$request->setStoreId(Mage::app()->getStore()->getId());
$request->setWebsiteId(Mage::app()->getStore()->getWebsiteId());
$request->setBaseCurrency(Mage::app()->getStore()->getBaseCurrency());
$request->setPackageCurrency(Mage::app()->getStore()->getCurrentCurrency());
$request->setLimitCarrier($limitCarrier);
return $this->collectRates($request);
}
