Using attachserial AND attachPDF

-- HikaShop version -- : 3.1.1
-- HikaSerial version -- : 2.0.0
-- Joomla version -- : 3.7.3
-- PHP version -- : 5.6

Hi there,

I would like to achieve the following:

- As attachment to the order confirmation email I want ONLY a png file produced by attachSerial
- On the customer download area I want the user to download a PDF document produced by attachPDF

Both docs (PNG attachment and PDF download) are related to the same product and the same serial.

Is this possible? How can I do it?

Thanks