If the printers have the ability to connect to a LAN then it is very easy, do you have a server?
If not then installing them on each pc shouldnt be a major pain but it would be easier to have a central computer.
Basically you use the add printer wizard, create a new local TCPIP port, give it the ip of the printer then install the drivers and thats about it!
If you have a server, do the above on the server, then share the printer and then all people have to do to add it would be to browse to \\servername then double click on the shared printer name to automatically add and install the printer + driver.