I did what you did choosing "More Printers" in the toolbar, but when I chose "HP IP Printing", nothing came up. I think the problem is that I am not on the network. However, regardless of what I choose, I can't seem to get it to work.
One problem is when I choose "Windows" in the Toolbar, everything is greyed out. If I could get in here, maybe I might have some success.
Since I can't get the HP7660 driver, I was told by HP that the hp photosmart 8200 uses the same driver, so I chose this from the list. So, this is what I did. The only choices open to me were to choose "IP" or "Advanced". Neither seemed to work.
Choosing "Advanced" in the Toolbar, I, then, chose
Type: Windows
Device: Another Device
URL: smb://(the IP address of the computer to which the printer is attached)
Name: hp7660
Location: same IP address of the computer to which the printer is attached
Print Using: selected the "hp photosmart 8200 series"
The strange thing is that when I try to print a page, the messages that appear are: "Opening Printing Connection" and underneath this line,
"Printing page 1, 16%....", then it closes and the green light on the chosen printer goes to red and "Paused, default". But, nothing occurs at the printer, no pages print, no error messages.
So, since there is no error message, I assume that the "hp photosmart 8200 series" driver would work and the problem is in the path that is set up for the printer. When I had Tiger, no problem, but apparently Leopard is very unforgiving and I do not know what changes have to made in the path. When you choose Type: "Windows", it automatically chooses the URL as "SMB://" for the path (which then needs the IP address added to it).
Any suggestions?