Вот еещё вариант, просто и легко. В файле catalog/model/checkout/order.php находим // Text . Дальше думаю поймете по аналогии. Добавлены пункты с 512 по 517
// Text
$text = $language->get('text_new_received') . "\n\n";
$text .= $language->get('text_new_order_id') . ' ' . $order_id . "\n";
$text .= $language->get('text_new_date_added') . ' ' . date($language->get('date_format_short'), strtotime($order_info['date_added'])) . "\n";
$text .= $language->get('text_new_order_status') . ' ' . $order_status . "\n\n";
$text .= $language->get('text_new_shipping_address') . "\n";
$text .= $order_info['shipping_address_1'] . "\n\n";
$text .= $language->get('text_new_email') . "\n";
$text .= $order_info['email'] . "\n\n";
$text .= $language->get('text_new_telephone') . "\n";
$text .= $order_info['telephone'] . "\n\n";
$text .= $language->get('text_new_products') . "\n";