[BigETI]

Coordinates and interior IDs are basicly GTA SA game engine inbuild features. Interior IDs just changes the way the game engine renders the scenes, still the collision calculations remain the same. Virtual worlds are a feature from SA:MP to change the way how players stream players, vehicles, pickups etc. so basicly someone in the 1st virtual world won't see someone in the 2nd virtual world even, if they are almost at the same position, since the server only streams players, vehicles and pickups, if the virtual worlds equals the entity uses. Virtual worlds can't be manipulated using cheating engines.