Add-on images for NW client and ZfD Agent

I am starting to understand more about how to use ZEN imaging but am
still struggling with some things. Specifically I have a base image
that just is Windows XP with current patches and other settings I want
and set up so it is Sysprep'd. I then want to law down add-on images
for NW Client and ZfD Agent so that I can update those when they change
and not touch the base image.

How do I get the XP WS to reboot after Sysprep is done, then log into
the desktop then run the install for the client and then run the
install for the ZfD agent all automatically?

Thanks,

Dan