Yes, here is from his read me:
TweekSH3 does have a hidden secret though. You can alter the number of reserves, extras and external slots...to a point. If you just run it by clicking on the EXE file, you can't do this. You will have to make a shortcut so you can provide a command line option to it. See the screenshot below
Look in the file, there is a picture showing where to do this.
