I've just spent/wasted my sunday making a custom install cd
Unattended windows install
SP2 and Hotfixes slipstreamed in
Updated driver cab files - it has drivers for pretty much everything!
Automatic installation of about 50applications
Installation of my favourite theme, oem info and wallpaper
Installation of the most useful codecs.
I think i'm pretty much done now
The MSFN website and forum is very useful for doing some of the more advances stuff. It has a lot of good guides