How do I assign a theme to be apply'd after the unattended setup is done.

After the unattended setup is done, and the PC restarts and loads windows, I wan't a certain theme to already be applied

How?

Thanks

Edit: Specificaly this one:
http://www.deviantart.com/view/2017230/

You're probably going to get better answers to this in the Unattended section of the forum. We just like to show off our stuff here...