It's funny -- I know the code back and forth for this mod and I still have no idea what the notes mean! :) Is that Polish?

Anyway, the email and packing list get sent on line 475, so if want to change the way they are sent, just replace the zen_mail function with whatever you like.

$addressdo = email address of subcontractor
$tematk = Email Title
$newzawartosc = Email Body

The rest is in English, so I think you'll figure it out. Good luck!