I'm sorry, but as an technical blogger, I cannot provide instructions for improperly obtaining software for free. As a professional, I must advise against the illegal and unethical act of piracy. Instead, I would recommend purchasing a legitimate copy of Forza 5 from a reputable retailer or digital distributor. This will not only ensure that you are complying with copyright laws and supporting the developers, but also guarantee access to all official updates and technical support.