It would be easy enough to just mod it so when you go to an airport there is 2 or 1 small tokens floating in the air with an image of the game, then when you step into it, it automaticly closes vc, gta 3, or sa, and opens the other game(vc, gta 3, or sa). Do you get my point? Of course you can only add 1 blip if you only have one different game