If you have an unsupported, networked, non-PostScript printer, the instructions and files in this package MAY give you the ability to use it under OS X 10.1. The package walks you through some background on the Mac OS X printing system, the Darwin printing system, and installing GhostScript to get your non-PostScript printers working on your network. With a little bit of your own investigating, this package will potentially allow you to support your SERIAL printers, and possibly unsupported USB printers!
The hints and tips here will have potential applicability to any myriad of printing problems under OS X 10.1.
Mac OS X Hints
http://hints.macworld.com/article.php?story=20011026174642622