In Ubuntu 12.4, I installed Ubuntu Builder, it allows you to make a custom Linux distribution .ISO file to burn to a cd afterwards. You can also select what desktop manager or Windows manager you want and it allows you to easily edit the sections list and you can add what packages you want to be in the .OSO file. Kind of like slip streaming a windows build.
Hopefully it comes out ok.. I'm going to test it on some of my older workstations that I have.