I assume Windows.

Create a new printer in the usual way. Instead of selecting a port, there will be an option for FILE:. Select that. I usually select the Apple LaserWriter IIg so that it'll write a PostScript file, but if you're only interested in printing to the one printer, you might want to select the same printer you regularly print to. This could provide better quality, but I've never tried it, so I don't know for sure.

If you do the LaserWriter/PostScript thing, then you'll need a program that can view and print PostScript. If you don't already have one, GSView is good and free.

If you do the regular printer thing, then you should just be able to double-click the .prt file created and it'll send it directly back to the printer queue. But I could be wrong about that. You'd have to test it.

You can also get Adobe Acrobat (not Acrobat Reader), and it'll provide a printer that prints to PDF. Nice, and easier, but expensive.