The second thing you need is some kind of IRC application..such as IRCle for the MACS or
mIRC for Win95, (or mIRC for Windows 3.x)
Pirch, or
others for a IBM/PC clone.
A good place to find your choice, if you don't want to grab one here...is a friend from IRC's site..
Ballsy's IRC Realm.
I will include instructions for accessing IRC for these three catagories:
lPC with ISP
lPC with AOL
lMAC