Do you have an Apple LaserWriter 16/600 PS and want to use it in Windows Vista? The drivers no longer come with Windows, so any instructions you might have used on Windows XP have changed. Here is what I did to get the LaserWriter working under Vista:
1) Enter the "Add Printer" diaglog.
2) Select "Add a local printer":

3) Create a new "Standard TCP/IP Port":

4) Give it the IP/hostname of your printer. Do not query the printer automatically.

5) Select "Generic Network Card":

6) Since the Apple LaserWriter 16/600 PS driver doesn't show up under Vista like it did under XP, select something similar. I've had good luck with the "HP LaserJet III PostScript Cartridge v52.2":

7) Give the printer a name:

8) Do not print a test page. You're not done yet:

9) Right-click on the newly created printer and select "Properties". Go to the "Ports" tab. Select the port you just created a few moments ago and press "Configure Port":

10) Make sure to select "LPR", make the queue name "lp", and enable "LPR Byte Counting":

You're done. "OK" out of all of this and give it a try. You can still print the generic test page from the "General" tab of the printer properties screen.