Well, that didn't work very well. I installed the drivers and guess what, they don't appear in the printers list. It installed a bunch of files to /Library/Printers/hp/deskjet. In /Library/Printers/hp/Utilities there is a "Printer Model Data Files" folder, which includes a ".plst" file for my printer model, but like I said it's not showing up anywhere. Are these files in the wrong location? How do I get them to appear?