Basically, I am wondering what I need to do to set up the auto splitter for a Dishonored Any% speedrun.

You should use livesplit and set it to dishonored any% and then it will say that there is an autosplitter available and you just click activate and it does magic shit.

In LiveSplit , right click the window and go to 'Edit Splits'.Choose Dishonored from the drop down menu and any% as your category. Below those options it will tell you that there is an autosplitter available and will give you the option to activate it. Just click activate and hit OK once you're done.

Thanks for the help guys!