Customising Windows 2000 Logon Screen options

I need to add another button to the logon screen. This will be for users who have forgotten their password. They will then need to logon to their machine locally and reset their password using a password reset application. I am assuming that their is a registry setting that will help me do this.I have not been able to find documentationon this though. Please help.

 

Why not just tell them to do that? You won't get a customised screen - it's hard coded.