Try using a new gameconfig.xml file and see if that helps. you can download them from gta5mods.com. (only place I know where to get them) if not, send me your RPH log after the crash
Devix, your game is not working either? try to verify game files through steam by clicking manage>properties>local files>verify integrity of game files. Its going to take time but should help. If not, also send me a RPH log