Quake 4 Console & Tweak Guide
 

The console and .cfg file have a host of tweaks and tricks ready for the
user to explore. We outline some of the basics you should know.

"An autoexec.cfg file is a text file that you can edit with your settings
and have those settings run every time Quake 4 starts without any
interaction from you. You simply create a new text file in the Quake
4\q4base folder (the same location as the Quake4Config.cfg) and save it as
autoexec.cfg."

http://www.viperlair.com/articles/ho...tware/tweakq4/