How to add custom shipping price when create order programatically in Magento

How to add custom shipping price when create order programatically in Magento

Step 1: Add below code in custom order create function.

$shippingPrice = 20;
Mage::register('shipping_cost', $shippingPrice);

Step 2: Now open file app\code\core\Mage\Shipping\Model\Carrier\Flatrate.php
and add the code below.

Find code::
$method->setPrice($shippingPrice);
$method->setCost($shippingPrice);

And replace with::
if(Mage::registry('shipping_cost'))
{
$method->setPrice(Mage::registry('shipping_cost'));
$method->setCost(Mage::registry('shipping_cost'));
} else {
$method->setPrice('0.00');
$method->setCost('0.00');
}

Step 3: Done. Clear the cache.

Note: Override the file app\code\core\Mage\Shipping\Model\Carrier\Flatrate.php in local like : app\code\local\Mage\Shipping\Model\Carrier\Flatrate.php ... as you know :)