You mean CUPS (Common UNIX Printing System)? It's used by default. Just add your printer and away you go...
If you're curious on how to use CUPS to print to unsupported printers, you can find a wealth of information on http://www.cups.org. What kind of laser printer do you have? More information would help us provide better support.
I downloaded cups-58 from Apple site but it is not clear to me what to do with it. I recall the last time I used CUPS, I simply entered something in the url field of the browser. What I have now is far too complicated. I have a LaserWriter 16/600