DirkGently said:
Jumplion, why do you need to play after the ending? You can just reload a save from beforehand and not do the final quest. It's not like you get anything special, and you'd only be able to play if you choose the evil the ending, and there'd be nothing to do if you did the evil-evil ending. Also, stop for a second. You want to keep playing after the end of the game. The End. Ending. The finale, the last part of it after which there are no other parts because it's the ending.
It's a problem that shouldn't be in the game. I saved right before I put in the code (I have a memory of a rock sometimes) and then I died.
Saving the game right before it is only delaying the problem. Bethesda has said that they learned to not let their game end. As UsefulPlayer_1 said, the end to the game is pretty much a glitch that should be dealt with. It's having a game-crashing bug in a quest and saying "Well, why don't you play the other quests first and then go to that one?".
Besides, there's a weird satisfactory felling of seeing the ending of the game, going to the main menu, and click continue and start exploring again. They don't even need to make up a reason of how you survived, just make us play as we normally would.
EDIT: Or what Squiddy said above me (ninja'd!), mainly the principle of the matter.
EDIT 2: I couldn't miss a chance to say it; PS3 owners paid the same as everyone else and get "nary a teet to suckle on" from anyone else.