XP menu speed

[dsaranti]

Hi,
I am running XP Pro sp 1. I find the speed at which XP menus appear too fast for my taste. The registry HKEY_CURRENT_USER\Control Panel\Desptop \menushowdelay is set at 0. Whenever I change it it resets to 0. I even tried Tweak UI but the menu speed resets to fast. Would anyone know how to permanently set it, say, to 400?
Many thanks
Dimitri