alright so I had a dig and found what looks like my solution. In:
<shop>/includes/classes/order.php
There is a function 'send_order_email', in the section of that commented as send addtiional emails, I added and if/check:
PHP Code:
$total_weight = $_SESSION['cart']->show_weight();
if ($total_weight > 0){
zen_mail('', SEND_EXTRA_ORDER_EMAILS_TO, SEND_EXTRA_NEW_ORDERS_EMAILS_TO_SUBJECT . ' ' . EMAIL_TEXT_SUBJECT . EMAIL_ORDER_NUMBER_SUBJECT . $zf_insert_id,
$email_order . $extra_info['TEXT'], STORE_NAME, EMAIL_FROM, $html_msg, 'checkout_extra', $this->attachArray);
}
And that seems to be doing the trick nicely. Of course if that is setting off alarm bells to any folks who know better around these parts I'd appreciate a heads up