Well finding all of them can be a tricky job. It depends on how much you are interested in completing the task. Just keep following the points in your mind and your quest will become easy. Always ...

There's a thin alleyway at the location we've given on the map, one that can be breached from either entrance to the north or south (you'll need a car to smash through the chain-link fences, however).

At the location given on the map, you'll find a little alleyway that's completely blocked off by a chain-link fence. You can smash through the fence rather easily with a car, and then claim the poster ...