Want to change the screen-saver at the logon screen:-
1. Start>Run
2. Then type REGEDIT
3. navigate to HKEY_USERS\.DEFAULT\ControlPanel\Desktop
on the right pane find the string named SCRNSAVE.EXE
Double click it and enter the full path to the screen-saver you want and click
OK.
or if you prefer:
Go to
www.dougknox.com
Win XP Utilities, Change Default Screen Saver
For more information:
http://support.microsoft.com/?kbid=314493
Change the Windows Logon Screen Saver in Windows XP
Note you can save the registry key first by:
On the File menu, click Export.
In the File name box, type SaveKey, and then click Save.
Or create a system restore point prior to editing.
Note: If the registry key is not there, you can simply create one by going edit
http://support.microsoft.com/default.aspx?scid=kb;EN-US;322756
HOW TO: Back Up, Edit, and Restore the Registry in Windows XP
Disclaimer: Modifying the registry can cause serious problems that may require
you to reinstall your operating system. Use the information provided at your own
risk.