edisconarter has been experimenting with save game files for some time now, and he now tells us that he has finally managed to edit them. This enables him to make many adjustments to the game, one of which is being able to spawn a helicopter inside a garage:
“There’s a lot of buildings without roofs to explore, and some city blocks are unpainted inside. I found an island of rubble inside one.”
For more screens, info and a video of the chopper in action, visit this GTAForums topic.