To configure the workflow, put the (unzipped) downloaded file into the /Library/PDF Services folder. Open the workflow in Automator, and then set the IP address of your iPod touch or iPhone in the first line of the AppleScript action, and set the save to location in the last action to the desired location on your iPod touch/iPhone. (Note that you need to have the iPhone/iPod touch mounted via Air Sharing to use this workflow.) Finally, save the workflow with whatever name you want to appear in the PDF print button menu.
Now all you have to do to get an item onto your iPod/iPhone is to select Print to iPod (or whatever you called the workflow) from the PDF drop-down button in the Print dialog box.

