Changing Cars in PS2 Games: Depends on the Title

Car switching varies entirely by game. Examples:

• GTA III / Vice City / San Andreas: Steal any parked/driven car. Buy at dealerships (San Andreas). Cheat codes spawn specific vehicles.
• Need for Speed (Underground 2, Most Wanted, Carbon): Buy/unlock cars in Career; switch in Safe House/Garage menu.
• Gran Turismo 3 / 4: Buy/win cars in Garage; select before race.
• Burnout 3 / Revenge: Unlock via progression; choose in Junkyard/Garage.
• Midnight Club 3 / DUB Edition: Buy/customize in Garage; switch freely.

No universal method exists. Tell me the specific game for exact instructions.