GTA 4 One Man Army Achievement Tutorial (Newly Discovered)

READ FOR INFO!!!! Found a different way on how to get the achievement. This video shows how to get the achievement without having to land on the train tracks like many other videos have been showing. This is especially useful for people who already have all the islands unlocked, that can't get six stars anymore for crossing from one island to another. Just a little variation. Hope this helps

I've been getting a lot of comments on how I went from 3 to 6 stars in just a few seconds. I just got lucky I guess. I've tried this a second time and it took a little longer to get six stars, but it still works great.

ATTENTION ALL CHEATERS! The following cheats have been confirmed to disable the ONE MAN ARMY ACHIEVEMENT.
-Full health and armor
-Full health, armor, and ammunition
-Remove Niko's wanted level
-Spawn Annihilator police helicopter
****Note that some cheats only permanently disable achievements if you save the game after you entered the cheat and are playing under that file. Some of these and others will prevent other achievements from being unlocked so make sure you do not save your game after cheating if you are planning to get more achievements under the same file.