Which patch do you have? Did you buy the game or do you use crack? Does this happen at the start i.e. The Cousins Bellic. I also heard that you have a
trainer installed?

You need Xliveless and above 1.0.1.0 patched game. It will surely crash and reset the settings. You also need to place your savefiles at Documents<Rockstar Games<GTA IV<[make a folder]savegames<[place your save game here]
Always cross check if the mod can be played in you pc.
This post has been edited by Dr. John13 on Thursday, Apr 12 2012, 11:56