I have a stock xbox 360 and i did the second step, by using Horizon. I put the DLCs in my Hard Drive, i checked, it automaticly put them in Forza 4 directory, but they don't work. I open the game and nothing has changed. It still doesn't show me Porsches, it still shows me the DLC cars still as DLC and it doesn't show me the new DLC cars.
How can i make it work? Please respond ASAP.