How do I use Quake 3 Maps?

Download the Demo Mode Crack. After you installed it you got to rename your demomain folder to main. When you done that rename the pak0.pk3 file in it to pak1.pk3. Then copy your Quake 3 pak0.pk3 in the main folder.
Well, thats it! Now your are able to play Quake 3 Maps.
You can load the maps in the console by typing:
/map mapname (ex: /map q3dm1)

What are the cheats?

/god - God Mode On/Off, turns invulnerabilty on/off
/give all - You get all Weapons and full ammo
/noclip - Clipping On/Off, turns clipping on/off for flying around and walk through walls
/nofatigue - No Fatigue On/Off, gives you unlimited fatigue
/allammo - gives you full ammo