Only one profile in win2k professional

I manage over 40 laptops that have win2K pro OS.
Since my users travel constantly and have to connect to different networks, they keep on creating brand new profiles, without their outlook, IE, etc., settings. It is starting to be a REAL BIG problem.
Can anyone tell me how to FORCE a unique profile or how to redirect ANY new user on a laptop to a determined profile in win2K pro?