I wish that I can say "Knights of the Nine" is the long awaited add-on for the Elder Scrolls: Oblivion, but unfortunately it's not. Bethesda has fed us small crumbs along the way consisting of small quests, books, horses, saddles and other insignificant thingies. This so called add-on is just a reunification of all these lovely and useless bits. We are compelled to dismiss this product for its non-value, but we must remember that Oblivion has tons of fans and most of them have consumed "Nights of The Nine" with great pleasure. These helpful cheats are for them:

Bring up the console prompt with the `/~ key, then enter the code.
ToggleGodMode - Toggles god mode on and off
PlayerSpellBook - Add all spells to player
ToggleMapMarkers - Reveal all map locations
TCL - Toggle collision on and off
TAI - Toggle AI processing on and off
SaveGame [filename] - Saves game
QuitGame - Quits without going through menus
Player.setAV [attribute] [number] - Sets the indicated attribute to the indicated number; works with Strength, Intelligence, Willpower, Agility, Speed, Endurance, Personality, and Luck
MoveToQuestTarget - Moves player to current quest target
ShowFullQuestLog [QuestID] - Show all log entries for a single quest
ShowQuestTargets - Show current quest targets
ShowQuestLog - Show quest log (optional: write 0 for current quests, 1 for completed quests)
CompleteAllQuestStages - Sets all quest stages
HairTint [number] [number] [number] - Set hair color, RGB
SetCameraFOV [number] - Sets camera field of view, number is in degrees, default is 75
SetFog [number] [number] - Sets fog, start and end depths
ToggleFogOfWar - Toggles fog of war on and off
ToggleMenus - Toggles menus on and off (good for screengrabs)
ToggleSky - Toggles sky on and off
ToggleTrees - Toggles trees on and off
ToggleWireframe - Toggles wireframe on and off
ToggleWaterSystem - Toggles water system on and off