Does Fable 2 Auto Save After Finding the Last Demon Door?

I've been trying to find all the demon doors and finally have done so, but I have to be corrupted to open one of the last  ones. Problem is, my character is good. So I played throught the game again as a bad character, only  to find that I needed the laugh expression on a different door, which is obtained by being 25% good or something. Now my good character is 100% pure and good, whilst the bad character is 100% evil and corrupt. So basically I just want to get the achievement for finding all the doors, but not actually ruin my character in the process. So if I can make my good character corrupt enough, I don't want the game to auto-save. So does it auto-save when found? 

Thanks :)
 
Damn, forgot to move to Fable 2 thread ¬_¬