...Because he looks about the right age. The only reason for the DVD change is that HC was a classic case of miscasting in the PT. THE BLOKE LOOKS NOTHING LIKE SS!! Even if they had tried to age him with CG it still wouldn't have looked anything like the unmasking scene. I suppose they could erase SS from the unmasking scene as well to make it tie in with the ghost scene. I think were stuck with the HC ghost now for the rest of eternity.