OK I used Ropu's Shipping Generator to generate the following:
Code:
$this->mc_shipping_methods = array(
                        'freeshipper' => array(
                                    'domestic_types' =>
                                      array(
                                          'freeshipper' => 'Free Shipper'
                                           ),

                                    'international_types' =>
                                      array(
                                          'freeshipper' => 'Free Shipper intl'
                                           ),
                                        ),
                        'itemnational' => array(
                                    'domestic_types' =>
                                      array(
                                          'itemnational' => 'Per Item National'
                                           ),

                                    'international_types' =>
                                      array(

                                           ),
                                        ),
                        'iteminternational' => array(
                                    'domestic_types' =>
                                      array(

                                           ),

                                    'international_types' =>
                                      array(
                                          'iteminternational' => 'Per Item International'
                                           ),
                                        ),
                                  );

$this->mc_shipping_methods_names = array(
                                         'freeshipper' => 'Free Shipper',
                                         'itemnational' => 'USPS Media Mail',
                                         'iteminternational' => 'USPS Air Mail',
                                        );
And then I inserted into googlecheckout.php
(I think this is the same code as Doug previously offered up).

But still same error when submitting order:
Code:
<error-message>Duplicate shipping name FREE SHIPPING! found.</error-message>
I'm stumped.

I should add that no errors are showing up in response_error.log

But I figured out the answer to one of my previous trivia questions:
mc = merchant calculated

Doh! Now only if I could answer some of the more important questions. Such as where do I go from here? And why doe this mod not want to work for me?

Woody