CK Graphics mod. Also to prevent lag without mods: Lower graphics (usually shadows and stuff) Delete some mods Use less traffic cars
F11 - World editor, Type in theForest press enter, it highlights theForest, Right click on it and delete theForest, it removes vegetation, game runs faster, exit world editor without saving changes so the map loads original version everytime it is selected, This process will need to be repeated everytime you want to drive instead of watching the grass and trees do grass and tree things. (Every time you reload the map) Seeing the map with no trees, rocks and grass makes it look ugly but it's a car simulation not an environment simulation, um. sighs..