Need help with forza 4 mods

Hello! :smiley:

Can anyone help me modding my forza 4 iso? :worried:
I’m using LT 3.0 in my xbox and i want add some mods for forza 4, like wheels, bumpers remove, camber mods, things like that, but i don’t know how to do that. :confused:
I have downloaded Project Underground V3 for forza 4 but i don’t know how to patch him.
Someone help me please… :cry: