In order to print to pdf you will need a virtual printer like cutePDF Writer.
CutePDF Writer
When you install it it should be one of the choices in the drop down menu for printers when you go to print the pdo. It will print to pdf.
imcold also has a small program called PDO Tools that will print a pdo to pdf. Here is the page in the thread discussing the developement and use of PDO Tools. Page 8 post #77 has the announcement that pdf is now supported.
PDO tools and format discussion