With this tutorial, you could import new vehicles in GTA 4. The carcols one might have fewer numbers sets though, the other two lines need to have these exact number/text sequence. For those unaware, earlier in the month, Rockstar announced that a number of licensed songs within Grand Theft Auto IVs radio stations were going to be. Vehicles files are stored in vehicles.img located in Grand Theft Auto IVpcmodelscdimages. If the lines do not look like this, they are incorrect and need to be skipped.
Then inside audio create folder 'Sfx' and past there content of this. Single lines inside a txt file, the three lines can be and usually are in the same txt file. 2) they are not correctly detected by the program (sometimes happens)