[xwiki-users] Modifying the pdf-export

Hello, right now I'm trying to modify the pdf-export for adding attached pdf-files to the end of the export like the existing functionality for adding attached images. Starting from the beginning with the pdf.vm I couldn't find an analogy to include the pdf-files in the way of image-files, because as I see it the images just get rendered as html. Can anybody give me a hint how to proceed to solve this task? Many thanks in advance, Josef Haimerl