I am trying to figure out a way to merge 2 PDF documents into one. E.g. click a button to create shipment document - which should contain packing list and Invoice in the same PDF file... one option is to create the whole template in Advanced PDF and somehow use that in script to dynamically load with data. Is there any other approach where I can just render 2 transactions into PDF and then stitch the PDFs together?

Did you manage to solve this?