Deny Simultaneous Logins to All Users EXCEPT Admin?

Windows 2000 Small Business Server
With Windows XP Pro Workstations

I am using roaming profiles and folder redirections.  I want to restrict 
individual users to only one (1) login on one PC at any given time (no 
simultaneous logins by any given user).  However, I want the Admin users 
to have multiple simultaneous logins possible.

Do I simply put a script (see below) in each user's login profile and 
omit it from the Admin users?  Any caveats?  Any better suggestions?
	e.g.: http://windowsitpro.com/articles/print.cfm?articleid=82454

Thanks.
Fred