/** The problem is that Paypal doesn't display the Shipping name that's sent across to it, it's displaying the shipping code.
  *  So to get the shipping options looking pretty in Paypal you just switch around the name and code values
  */
 protected function _prepareShippingOptions(Mage_Sales_Model_Quote_Address $address, $mayReturnEmpty = false, $calculateTax = false)
 {
     $options = parent::_prepareShippingOptions($address, $mayReturnEmpty, $calculateTax);
     foreach ($options as &$option) {
         $tmp = $option->name;
         $option->name = $option->code;
         $option->code = $tmp;
     }
     return $options;
 }