How to schedule updates or package installation

I’ve a limited bandwidth net connection. There is unlimited download available only between 2-00AM to 8-00AM.
So my question is how can I schedule updates or package installation so that it starts automatically after 2-00AM without my intervention?

Goto YaST > Automatic Online Update and set your time.

System menu - Administrator settings - Software - Automatic Online Update, then set the time to run the updates.

I don’t know if new installations can be scheduled in the same way.

I need to do this in OpenSUSE 11.4, Any help?