Ubuntu :: Locking Printer Config

I run 6 machines at our local library with Ubuntu Lucid. Here is a problem. We use a network printer accessed through the ethernet cabling system. It isn't attached to a computer. I want to set it up so the Ubuntu computers find it by ip address, it has a static address. Then I would like to lock down the printer config as each week other printers show up there, all basically the same printer but only works if the patrons pick the correct iteration of it and it doesn't always stick to the default option I haver set up. So people get confused and then pick another one and no prints. I want them to click print and bingo only one printer shows up and it is the ip address I have set up. Ubuntu seems to love to add numerous copies of printers and in this situation it is creating havoc. So can I somehow set a command to lock the printer config and eliminate all this confusion? I hope this is clear as it is a fairly complicated issue.But is reflecting poorly on Linux to people who come in and I want it to b e very stable.