I would like to thank the developers of Ketarin for doing such an awesome job. It really streamlines my fresh install kit. It also takes a lot of coding out of the whole process - though I still had to write some basic scripts.
I've put together a post that shows how to create an automatic updating fresh install kit that you can run from a local or network source with the latest beta 6 of Ketarin 1.6. I've offered a zip file with my pre-configured package and batch scripts at the bottom of the post.
It also shows how you can silent install iTunes without manual configuration.
http://www.eneerge.net/home/automaticupdatingfreshinstallkit
The batch scripts should be configured for your environment, but that only involves editing one line.
Let me know how this works for you and how I can improve upon it.
Thanks