Create a '.txt file in the game directory' and name the file 'LOCAL.INI' and add the following codes to the text.
Skip to the next mission: CanAlwaysPlayNext=TRUE

Car becomes monster truck: MONSTER_TRUCK=TRUE

Car get big bands: CARLOS_FANDANGO=TRUE

Auto-Play: PlayerUseAI=TRUE CPU
All cars in all episodes: FE_UNLOCK_ALL_CARS=TRUE

Enables free roam mode: FE_Enable_Free_Roam=TRUE
Disables conversations: PlayConversations=FALSE

Disables sound: DisableAllSound=TRUE

Disables skid marks: DisableSkidMarks=TRUE