That's all you need to do. When starting a new game, after you choose whether or not to rename the MC, If you see a screen with 5 choices similar to the screenshot below:
the mod is installed correctly, if you don't see five choices, the files haven't been placed in the right folder.
Once you have made the choice to tell the walkthrough which path you want to follow, you just need to play the game, and when you get to the first choice:
either
"DISCUSS THOSE OLD BOOKS" or
"MAKE SOME JOKES" one of them should be highlighted green
Unless you chose the evil path, in that case the first option would be
"TELL HER MADDIE WAS NOT THE REASON FOR YOUR POSITIVE ANSWER" during the second choice.