My first revision Quake 4 Config.cfg file, hope it works as great as it does on all the test systems I've tried it on for you guys
Notes:
- Tweaked for 1280*1024 resolution
- Tweaked AA performance, on suitably powerful graphics may allow for up to 6x or better.
- Tweaked armour value from 0.66667 to 1.1 in singleplayer, tweaked to 1.0 in multiplayer.
- Console command key changed to "`" (the key before "1")
- Tweaked gamma to 1.6, just to make things more realistic, meaning even in daylight it will no longer look like its late dusk

- Tweaked brightness to 1.5
- Other minor tweaks
General Tips:
Make sure your running the latest drivers.
Set AA and AF via your drivers control settings, this tweak relies on it.
To measure performance improvements (if your the type that likes to see that) you can enable the Q4 console and use its built-in FPS measurment.
Installation:
Dowload the .zip file and backup your current config.cfg file, just in case. The file is located at *drive letter designation*:\Quake 4\q4base.
Once backed up simply extract the .zip to the same location, overwriting the current config.cfg.
Thats it, enjoy the performance gains! Let me know what you guys think of it 8)
Disclaimer
I do NOT guarantee everybody will see huge improvements, some may only see a small increase, and indeed some may see no increase or even negative results, hower I have tested the modded cfg file with various systems and configurations, but its impossible to check the cfg with every configuration in existence.