Sweet, I got it to work. Here's how I did it, for future forum reference:
Under
Print & Fax in System Preferences, click on the + button
Click on
IP Printer at the top
Protocol is
Line Printer Daemon - LPD
Address is
172.16.1.33 (I don't know if this is the same for everyone, but that's what it was by default for me. All I did was plug the thing into my printer and plug in the power cord. I found the IP by looking at devices that are connected to my router.)
Queue is
lpt1, per
gsahli's instructions above. (it will subsequently rename itself to whatever you name the printer)
Name is
whatever you want (I'd recommend the model name/number of your printer)
Location is
172.16.1.33, just as the address field above.
Print Using whatever driver you can find that's close to your printer. In my case, I used
LaserJet 6 series - Gimp-Print v5.0.0-beta2.
The Gimp drivers are a last resort, and I can see why. As I complained in an
earlier post, the quality of the printing looks only injet-quality even though it's a laser printer. My next adventure will be finding better a print driver.