How to start iChat without having .Mac or AIM?

Article:		P2P Networking with Rendezvous and iChat
Subject:		How to start iChat without having .Mac or AIM?
Date:		2003-07-06 14:55:02
From:		anonymous2

I'm trying to set up a local network-only iChat session, but when I launch iChat, it won't let me do anything until I sign in with a .Mac or AIM account. Anyone know how I can get past this login to access the Preferences menu? When I cancel the login iChat just quits.