Thanks, it almost worked.....
I have the usb printer connected to my network through an old buffalo link station NAS drive. I set it up as an LP printer. the trick worked with windows, but not with the mac. It sees the printer, but it wont print.
All the other instructions worked, connected the printer via usb, mac detected it and found the drivers, then everything just worked. Ill probably just leave the printer connected to the mac mini full time from now on. Maybe I can get the windows pc's to see it running off the mac mini.