Whilst these mods are great and allow you to continue after you conclude the battle of Hoover Dam, that’s all they do,” states mod creator Kazopert in the mod’s description.
“You’ve all most likely heard of mods such as CAGE and Continue After Ending by McLion. A new mod for Fallout: New Vegas, called FPGE (Functional Post-Game Ending) fixes the original version’s end game problems by letting you explore a world that has been altered by the decisions your character had made during the game.