Limit Number of Apps or open files

I have a problem user who insists on running too many applications at once, and having multiple documents open in each application. He completely overwhelms his computer and then complains that it is performing badly. Is there anyway that I can limit the number of applications or files that he can open concurrently? He is running Win 2000 Pro, on an NT 4.0 network. I’ve been searching for some type of policy that I can setup, but haven’t found anything.