Microsoft Knowledge Base Article 303021 contains the following summary:
If a Windows NT 4.0-based or a Windows 2000-based server stops responding (hangs), you can create a memory dump file to troubleshoot the issue. When you create a memory dump file, it is similar to forcing a bug check or a Stop error on the server.
To perform the procedure that is described in this article, you must have second computer called Remote Debugger and a NULL modem cable.
NOTE : If you use Windows 2000, you can transfer the memory from the console. If you use this functionality, you do not have to use a Remote Debugger computer; however, Windows may not create a dump file for the computer each time it stops responding.
For additional information about how to create a memory dump file on a Windows 2000-based computer, click the article number below to view the article in the Microsoft Knowledge Base:
244139 Windows Feature Allows a Memory.dmp File to Be Generated with Keyboard