When you are editing the Order or on the Invoice or the Packing slip?
There is a function for getting a Product's Model number that you can use by adding the products_id with the function:
zen_get_products_model($products_id)
where the $products_id is replaced with the current products_id ... if it is not available where you are trying to display it ...
Model already shows on the file:
/admin/orders.php
around line 506 with:
' <td class="dataTableContent" valign="top">' . $order->products[$i]['model'] . '</td>' . "\n" .
The products_id can be accessed on the
/admin/orders.php
file with:
$order->products[$i]['id']
where are you trying to get this to display?