I am currently using PDFCreator (http://sourceforge.net/projects/pdfcreator/) to print PDF files from various documents.
I am looking for a program or a means of printing on an existing PDF file. Using a physical printer, you can run the same piece of paper through the printer twice if you are using the output from two different programs to print one final product. I am looking for a program that would duplicate this functionality.
After a bit of searching, I have not been able to find anything that addresses this need.
Can anyone recommend a program or a method to print on a PDF file?