This is added in the:
/includes/modules/pages/checkout_shipping/header_php.php
PHP Code:
if ( (isset($quote[0]['methods'][0]['title'])) && (isset($quote[0]['methods'][0]['cost'])) ) {
$_SESSION['shipping'] = array('id' => $_SESSION['shipping'],
'title' => (($free_shipping == true) ? $quote[0]['methods'][0]['title'] : $quote[0]['module'] . ' (' . $quote[0]['methods'][0]['title'] . ')'),
'cost' => $quote[0]['methods'][0]['cost']);
zen_redirect(zen_href_link(FILENAME_CHECKOUT_PAYMENT, '', 'SSL'));
}
NOTE: when testing this, you need to "build" the output by going to the Shopping Cart, then to the checkout to have it rebuild this on the checkout_shipping then go on to the checkout_payment and checkout_confirmation to see the changes ...