Hello
I would like to share some cool news with You. Little Gears team have finished their mod for Quake 4. It's one giant level with three objectives that can be done in any order, each objective change enemy forces in next objectives. How does it look? Here is trailer : http://www.moddb.com/mods/false-dawn/videos . Here is link to download : http://www.moddb.com/mods/false-dawn/downloads
You can download archive with mod and unpack it to Quake4 main folder or download installation file and follow wizard steps.
Have fun