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If you want to add the shipping method to a column in your admin sales order grid, create a module to override app/code/core/Mage/Adminhtml/Block/Sales/Order/Grid.php and add the following code to the _prepareColumns() method wherever you want the column to be:
$this->addColumn('shipping_description', array( 'header' => Mage::helper('sales')->__('Shipping Method'), 'index' => 'shipping_description', ));