A free program for Windows, by H1Vltg3.

Iron Man Script MKIII is a mod for the game Grand Theft Auto IV that allows you to have a more immersive experience. It replaces the in-game scripts with actual dialogue and sound effects so that you can feel like you are in the scene. The mod will also make the player model more realistic.

How to install the mod?

The first thing you need to do is download the file and save it in a folder. The next thing is to open the game and select the Iron Man Script MKIII folder. It will be there and you will be able to start playing.