As I was trying to set up printers in my recent 10.4 install, I realized that Apple moved the "super-secret" advanced print protocol options.
Under Panther, to get the Advanced menu options (like "Internet Printing Protocol using IPP") to appear, you had to option-click the Add button in the Printer Setup Utility.
Now with Tiger, option-clicking the Add button doesn't seem to do anything. Instead, you need to option-click the "More Printers..." button at the bottom of the Printer Browser window that opens when you click Add. The "Advanced" option will now be available in the top drop-down menu of the panel that slides down.
Mac OS X Hints
http://hints.macworld.com/article.php?story=20050504165700628