How to remove `guest' as Default Login ID in MSSQL2000?

From: Ann Yong He (annyh79@hotmail.com)
Date: 11/20/02 

From: "Ann Yong He" <annyh79@hotmail.com>
Date: Wed, 20 Nov 2002 02:55:35 -0800

Hi, I would like to change the default login id from guest
to another id (or null). Please advise on how I can do
this, as this can't be done in Enterprise Manager (like
version 6.x).