To select a different visual style for login you need to edit the following registry entries


HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\ThemeManager

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\ThemeManager

HKEY_USERS\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\ThemeManager

When you are there, look over to the right-hand pane and look for this key -

DllName - this key is for the Visual Style you are using currently, Luna is the default Visual Style in XP = %SystemRoot%\Resources\themes\Luna\Luna.msstyles