After looking arouund some, I've come up with exactly nothing.
I don't suppose this could be a controller issue? I've had similar problems with other games where things were happening way too fast, and seemed to be out of control, only to find that my controller was "sticky" and was causing the problems.
It's one of those things that tends to get past us, since we usually look to the game or system for the answer. Sometimes the problem is in the palm of your hand.
eh, my bad. I totally bypassed the first, and most obvious question I should have asked... does it play off the disc? If so, then something probably just broke when you copied it to the hdd.
I thought it could be the controller too, but the controller works perfectly fine in other games and other uses...