I think the person logging on will need to have administrator rights to be able to write to thr reg.

now you could run a script from your computer (or any computer that is loged on as a domain administrator) that would modify a list of target computers.....

WRITEVALUE("\\$target_computer\HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Policies\System","NoDispCPL","1","REG_DWORD")

Bryce