Auto Logon to Win2k or XP

I have a need to make a workstation automatically logon to a Win2K network and bring up the workstation desktop when it boots.

This is because I have a reporting application that cannot run as a service and hence needs to be started from the users account start-up folder.

There will be occasions when the unit will need to be rebooted but will have no user to log it on at the remote site or anyone to use a remote control product to do the same job.

I understand the security issues of course and have put physical security in the way plus a keyboard emulator and no screen.

I have the option of either OS Win2K or XP but prefer 2K for this unit.

Can any provide an appropriate ‘free’ way of achieving this? Either Utility or regedit?