I've gotten even closer but have not been able to figure this out.

First of all, I have added this at line 861 of admin/orders.php:
$contents[] = array('text' => "I WANT cc_type TO GO HERE");
and that works.

Unfortunately, it seems that $oInfo->cc_type doesn't exist or is NULL at this point in the code. Over in includes/classes/order.php I found this at line 340:
// 'cc_type' => (isset($GLOBALS['cc_type']) ? $GLOBALS['cc_type'] : ''),
but un-commenting that line doesn't help.

Pointers appreciated for getting this info into $oInfo.

Thanks!

P.S. Am I asking this in the right forum? I haven't had any replies yet.