Easy fix:
Create a 2nd account on your PS3 and add another option file. That way you can keep the original option file you do not want to lose while having the 2nd option file to play.
I have 2 accounts. I have both the US and UK version of the game. I have one US and UK option file on one account and one US and and UK option file on the 2nd account account. So I am running 4 different option files on 2 accounts and depending on what I want to play, have 4 different options to choose from.
When you boot up your PS3, login into the account you want to play that option file.