J's Racing (PSX)

Advan:
On controller two, hold R1 + Triangle + Up + Start until the title screen appears.
Now the Advan may now be selected under "Free Race" mode.

Castrol:
On controller two, hold R1 + Square + Down + Start until the title screen appears.
Now the Castrol may now be selected under "Free Race" mode.

Honda:
On controller two, hold R1 + Up + Square + Start until the title screen appears.
Now the Honda may now be selected under "Free Race" mode.

Class 1 car:
On controller two, hold R1 + Circle + Up + Start until the title screen appears.
Now the Class 1 may now be selected under "Free Race" mode.

Dunlop:
On controller two, hold R1 + Down + Triangle + Start until the title screen appears.
Now the Dunlop may now be selected under "Free Race" mode.