Definetly need this thread. Here is one I know of: https://itunes.apple.com/ca/app/ghostbusters/id583354857?mt=8
It isn`t working for those Games/Apps that didn`t yet launched on the iTunes Store in the USA. You have to do it by Hand but besides that there is already a thread for the Game you had just mentioned. http://forums.toucharcade.com/showthread.php?t=173926