Laserjet 4+ IP Address

My company has recently acquired 4 HP Laserjet 4+ printers (circa 1992). Two of the printers have network cards. I wish to connect these 2 printers to my network but I am unable to find the IP address. Can anybody help with either the correct addresses if they are static or how to configure the printers from the setup panel on the printer? My network has Server 2003 on the server and XP Professional on the clients.