There are also pillars here that you can use for cover). (At that location there is a boat-walkway with a hole in it, if you walk under here to the end you can't be shot at by the helicopter, the cops can't get to you as easily, & they will only be coming at you from the front, as there is a wall behind you. Now set your way point marker to the bottom-right corner of the top-right island on the map. (With a cop car you can fit in the gap so that you save time by just driving forward as soon as you get the 6 star wanted level). Reverse the cop car into the far left gap until you get a 6 star wanted level. There will be cops there behind some road blocks & gaps in between the blocks. Go to the bridge on the far left of the map, that links the islands together. (now your save file will have all the above ready for re-trying if you fail to survive the 5 minutes on a 6 star wanted level). Now get some health, an assault rifle or smg, some grenades, & armor. To do this method, you need to have unlocked South Bohan (top right of map), but not the far left area of the map (you need it to be roadblocked to get a 6 star wanted level quickly & easily). This is an easier way to survive 5 minutes on a 6 star wanted level to unlock the 'One Man Army' Achievement.