update-notifications.php updates

Hi

I have a install of wordpress 3.0 and i made it to multiuser. Now i have try to make a install of some plugins from this site. With good luck :slight_smile:
But not the way that i see in the install guide. Acording to the guide i have to place the update-notifications.php in mu-plugin but the way i made the multipart i don´t have this folder or do i ?
I just install from the backend of wordpress 3.0

My love to the world

Thomas