To activate the following cheats you must first create a file called local.ini in the Starsky And Hutch game folder. Now add the following lines to activate the corresponding cheat: 

Effect: Line to enter into local.ini

All cars in episodes/seasons: FE_UNLOCK_ALL_CARS=TRUE
Always advance to next mission: CanAlwaysPlayNext=TRUE
Can skip conversations: CanSkipConversations=TRUE 
CPU auto-play: PlayerUseAI=TRUE 
Create super profile: FE_CREATE_BEST_PROFILE=TRUE 
Disable all sound: DisableAllSound=TRUE 
Disable conversations: PlayConversations=FALSE 
Disable gun icon in HUD: TurnOffThatFeckingStupidGunIcon=TRUE 
Disable most civilian traffic: UpdateCivilianTraffic=FALSE 
Disable skid marks: DISABLE_SKID_MARKS=TRUE 
Free Roam mode: FE_ENABLE_FREE_ROAM=TRUE 
Locker: FE_ENABLE_LOCKER=TRUE 
Maximize visual range: MaxVR=TRUE 
Monster Truck: MONSTER_TRUCK=TRUE 
Never run out of visual range: NeverRunOutOfVR=TRUE 
Show HUD: Show_HUD=TRUE 
Skip video card selection screen: SKIPDEVICESELECTION=TRUE 
Speed mode: SPEED_CHEAT=TRUE 
Start game paused: StartGamePaused=TRUE 
TV Specials: FE_ENABLE_TV_SPECIAL=TRUE 
Wide wheels: CARLOS_FANDANGO=TRUE 
Wobbly car: FUNNYBONES=TRUE 

Note: Change TRUE to FALSE to disable the effects of each code!