Help with setting up print server

Hi everyone. I have dont know how to setup a print server. I am using NT 4.0 server and 4 printers with ip addresses on the network. I have an existing print server but it needs to be replaced asap. What are the steps to setup a print server?
Some of the questions I have been asking myself:
1.) will changing servers create problems for users? If so, what should I do?
2.) Is there any way to minimize the impact on users? If i change servers, will the users who have existing printerssetup have problems printing?

Thnaks for your help!