Redo Ending?

[TittyKitty]

Alright, I just beat the game, but it really pissed me off because I was doing everything to get the good ending, and I was trying to get the good ending, but I ended up getting screwed into the bad ending.

I went into the orb chamber and listened to Alexander talk for a few minutes. After that nothing happened, so I assumed the portal must still be being made or I was supposed to go ahead and use Agrippa's head. I tried using his head and got a message that the portal wasn't open yet. I waited, and then the portal opened and Alexander started talking again. I tried using the head again, but it said the portal was almost ready. Then, the portal changes again and Alexander starts talking again. This time, I wait for Alexander to finish talking before I try to use the head, but by then it's too late and I get the bad ending. Every time I try to load back it's already too late.

As you can imagine, I was pissed, and I AM NOT playing it over again over that, but I would rather actually do the good ending than just watch it on youtube. Is the anyway to load back to the beginning of the Orb Chamber?