I just printed out the PDF files, taped them together, then taped them to the MDF. I also traced around them carefully with a fine point marker just in case one of the sheets came loose while I was cutting/drilling.
BTW, I also sealed the MDF with black polyurethane before assembly. THe edges soak up the stuff like a sponge for the first few coats, but it is worth doing - moisture/humid conditions make MDF swell.