For those that haven't found it yet, once you get to the culdesac/circle with the houses, garages and ambulance, THE PURPLE TRUCK is the mentioned "car" you need to place things around. To do so, anytime you picked up the tires or gas tank, go to the truck and left click. The same goes with the girl you find passed out by the truck that went off road. The food and water are in the houses, the tires and gas tank are in/around the garages. The tools are outside on the right (facing the culdesac from the entry/exit) on the back of a truck in a wooden old style toolbox, the wires should be the easiest thing you find, they look like large cables on the hood of a grey car in a garage, the keys are in one of the houses in the kitchen. I believe that is everything I can think of. Once you placed/found everything, it automatically ends the game and you find yourself in what looks like a small warehouse with the four girls and you can choose one you want to get jiggy with, though, the positions are limited and only a few can give you POV.