Running XP autoupdates via Code

[Jake]

Im looking for ways to write a script to go out and
update all of my XP workstations, I want this script to
do numerous other tasks as well.

I would like to use task manager to to fire my scripts.

I cant seem to find much good info about running widowns
updates without reboots and without prompts.

I need this to fire in the middle of the night when no
users are on and I need it totally automated.

Im trying to find something like an EXE that runs
windowsudate and maybe some switches to make it run
silently in the background on a logged off workstation
logged in as admin via code.

Any advice?

Thanks in advance
Jake Johnson