You may also wish to view the maps section which has a full breakdown of each map's weapons, armour, ammunition, health, powerups, items
 and enemies along with an overhead view


Walkthrough by Gamespot
http://www.gamespot.com/features/6136475/p-6.html

Walkthrough by PlanetQuake
http://www.planetquake.com/quake4/sp/guide_s2p1.shtml

Walkthrough by GamePressure
http://quake4.gamepressure.com/guide.asp?ID=266