To use setnick, type 'setnick' and follow the instructions. The first item lets you choose a new nickname. Type a period to make no change or type a new nickname. It will then ask you if you want to make your nickname your thinkname. If you say no, it will prompt you to type in a thinkname. (Thinknames are nicknames which appear instead of your name when you 'think') Next, it will prompt you to enter the message players in the arrival room see when you jump. Last, it will prompt you to enter the message players in the departure room see when you jump.
You are informed of the change when the program exits.