Don't worry found it.

includes/classes/order.php line 1094

zen_mail('', SEND_EXTRA_ORDER_EMAILS_TO, SEND_EXTRA_NEW_ORDERS_EMAILS_TO_SUBJECT . ' ' . EMAIL_TEXT_SUBJECT . EMAIL_ORDER_NUMBER_SUBJECT . $zf_insert_id . ' ' . $html_msg['EMAIL_FIRST_NAME'] . ' ' . $html_msg['EMAIL_LAST_NAME'],