HOWTO Install Printers Under Mac OSX
Mac OS-X Printer Installation
OS X 10.4 (see note at bottom for other versions)
HP Colour Laserjet Printers
First, click an empty portion of your desktop, then click Go > Utilities. Double click the Printer Setup Utility, then hit Add. The image below should help you the rest of the way.
Lexmark B&W Printers
To set up a Lexmark printer, follow the same instructions as for an HP printer, except use the configuration below after clicking Add.
Note
Newer versions of OSX have moved the printer setup into Print and Fax, or something similarly named. To reach it, you need to go into System Preferences.