Note: I am focusing one the original, not the remastered. So I am new to this kind of scene and I need a little noob help. It's like a simple car swap (like changing a charger to a 370z as a example) from the game itself. So what tools I need to use in order to achieve this and how complicated is it...

Hey everyone! I am new here to the scene. So I was wondering, can anyone know how to do a simple swap in-game? Just a already existing car and change that for the hot pursuit game mode.