Hi Karina,
I believe you dont need to change anything in the printer commands. Since this is just a text.
We have done similar Pallet labels for the Coke Pallets. But we didnt converted the format. It all depends on how you develop. I was trying to understand why did you initially converted the Label to .ITF format. You can directly do this in the Smarforms Layout with Barcode Options. Meanwhile I will also check from my side if I can find something on my system.
Thanks & BR,
Bhargav.