If the program simply is in one screen it's prety easy, just put in a command like Define the x and y-coördinates and you should be done. If it's something like a sidescrolling game that's a bit different.... you might want to rebuild the world in that case, but that's where some trouble might appear. Anyway, if you want more suggestions or something just post a short comment you need more help behind mine and you should be fine.