Carmageddon

Bigbottom = Bodywork trashed
Superhoops = Explosive peds
Igloofun = Hot rod
Goggleplex = Underwater Ability
Spamforrest = Instant handbrake
Intheloft = Drugs
Byeyournextgame = Jelly suspension
Chickenfodder = Bouncey
Funny jam = Turbo peds
Tramsaresuper = Pedestrian Harvest
Islandrules = Vesuvian Corpses
Smalludders = Giant Peds
Spamfritters = Free Repairs
Givemelard = Mega Bonus (Loads Of Money)
Spamspamspamspam = Pedestrians Glues To Ground
Havesomespam = Gravity Has Gone Strange
Mooseontheloose = Pinball Mode
Ilovenobby = Pedestrains Shown On Map
Russformario = Pedestrian Electro Bastard Ray
Hamstersex = Blind Pedestrians
Naughtytorty = Pedestrian Respawn
Boysfromthebush = Grip O Matic Tires

In network race type selection screen write Joyrider
Then you will get access to all cars in networkmode. OBS you have to choose all cars in the options screen.