How to use new dlc cars on downgraded game

[Mitchz]

hello, so i want to know how can i use the new dlc cars in a downgraded version of the game. i ve tried writting the new dlc name on the downgraded dlc list but the game crashes, so i guess im doing it the wrong way.

[Xranovision]

@Mitchz Crack Version? Steam? Rockstar?