Is there any way to schedule software update? I have software updates set to check weekly, but it seems to happen at random times during the day. I'd really like to have it run at a specific day and time - say 4:30 on Friday - so that I can just let it run on my way out the door, rather than having to let the computer restart in the middle of a workday. Is it possible to schedule the software update that granularly? Obviously it can't be done via system prefs, but maybe there's a hidden setting somewhere (or a utility I can download) that I'm not aware of as a Mac newb.
If you goto the Software Update preferences, you can set it to daily, monthly or weekly. Obviously, this a very basic update scheduler. If you want to update weekly at this time just goto preferences and select weekly, now.

You can also do it using an Apple script + softwareupdater as described here.