1.) Setup Livesplit: http://livesplit.github.io/downloads/
2.) Right click anywhere in Livesplit and choose Open Splits -> From File...
3.) Open one of the splits files found in the Resources tab of this site (for the lazy: https://www.speedrun.com/splits/TWDSS_Splits_x9g4i.zip )
4.) Right click anywhere in Livesplit and choose Edit Splits
5.) Underneath the Attemps box ensure that the Activate button is clicked.
6.) Enjoy. The script auto-starts, auto-splits, and auto-detects category based on your splits file.
Side Notes: The name of each split is unimportant. If making your own splits, you need to ensure you have the number of splits the script is expecting, and that the category/subcategory is set correctly. You can set the subcategory in the Additional Info tab inside Edit Splits. Make sure you compare against game-time. If you discover a bug please notify me (Samabam#8840) on Discord so I can fix it.