You need the global file for the preview in the loading screen.
I tried it earlier today, but it didn't work. I dragged one of my saved games, dragged global file into the save file, run the game, and still nothing...I don't know if its a bug or there's something wrong, but I always drag ALL my saved games to the save folder, which always includes the global file. I don't know why it doesn't work anymore, can't speak for others, but please, help.