PPDs: Live one of two places as shipped by Apple: /System/Library/Printers/PPDs/Contents/Resources/en.lproj (Apple Printers Only) /Library/Printers/PPDs/Contents/Resources/en/lproj (All other printers)

OS X allows you to put PPDs anywhere you want, then you just reference them when you add a printer. Quark likes them to be located in the first of the two folders listed, but under the PPD Manager in the Utilities menu in Quark you to point Quark at an additional folder for more PPDs.

How I'm handling PPDs The way I want PPDs handled is that I want all PPDs to reside in this folder: System Folder/Extensions/Printer Descriptions

This is your Classic system folder Printer Descriptions. The reasoning behind this is that should we add, update or change a PPD I can change it in that one folder and have it available to all my OS 9 applications. Then, under OS X, as long as I'm linking there my OS X applications are updated as well. It gives me one place for all PPDs to be stored that will update both OS 9.x and OS X.

This way may not work for everyone, I can't say I'm thrilled with it, but it does give me just one place to keep my PPDs which is THE WAY APPLE SHOULD'VE MADE IT TO BEGIN WITH!!!!