I have been losing out on shipping costs because items are being combined into one weight instead of the actual number of items being shipped.

In the FedEx Shipping module there is a field where you can turn on/off "Enable Ready To Ship". Which also has this below it: Enable using products_ready_to_ship field (requires Numinix Product Fields optional dimensions fields) to identify products which ship separately?

I had it set to false and FedEx tech support thinks it should be set to true. I set it to true and now I get error messages when I try to duplicate the invoice. What do I need to do to enable this Numinix gadget??? Or am I on the wrong track?

Thanks in advance.