Personally, I'd like to see The Hawaiian islands or Somewhere in asia.
Make Niko start a new life in a whole different country but he gets sucked into that violent lifestyle again.
idk, I'm high... sorry.
Have you got a shortcut to the game on your desktop? If so, right click it and select 'open file location' from the menu. That should be your installation folder.
Edit: Llama has forgotten how to internet.