I had the same problem(using 4.3E) and read in abother guide(not this website) that you should complete level one of the indianna game, (I think when you fly off in the plane), then save that game, then go out and delete that game(sd manager) and copy across the one for your region then start the game and load the reaion game and follow as normal after that. Also format to FAT32.(not specified in guide)
I did the above steps and it worked. The guide here did not work for me either, these points should be clarified.
hope thsi helps