Check Out This Amazing Back To The Future Mod for GTA 4
Introducing Grand Theft Auto: Hill Valley, a mod that gives Liberty City a complete Back To The Future makeover. The mod (or mods) gives you a Marty McFly character model and the classic DeLorean that comes with the Flux Compacitor.
It also has functioning Time Circuits and a Plutonium Tank and will allow players to select a date to jump to using the number pad. Oh yeah, it does go through time once you hit 88 miles per hour.
Check out the video description to grab the full list of mods needed if you want to try this out!