Crash Course on GRUB and Fully Automated Install

Using UEFI I can mount and run install from a remotely mounted ISO file. I am also able to create my own custom ISO for the purposes of automating RHEL 7.1 server installations.
Where I need a crash course is on modifying grub.cfg and all other files required to fully automate an installation. There is no display, no keyboard, and no mouse. Where do I start with modifying the install process and including my required packages for a custom RHEL 7.1 installation?
Please don't tell me to read documentation because I have and I am no better off today then the day I started looking at the documentation.
By the way, where can I download a copy of the documentation so I don't have to hack my way through the web version? I prefer PDF.
I need to bypass all GUIs, all prompts for user input.
I need to make a list of all required packages to install.
I need to have the installation run completely unattended start to finish.