.IMG (gta3.img) is a file that contains all models in game. In Grand Theft Auto: San Andreas there are many IMG files, one of which contains all clothing and character model.IMG files which contain this content: * Vehicle models (Cars, Boats, Helicopters and Planes) * Weapon models * Character models (In Grand Theft Auto III and Grand Theft Auto: Vice City it contains protagonist Model) * Object models (Like bus stop signs) * Buildings and Roads IMG files can be opened with IMG Tool, and to install almost all mods is needed IMG Tool.