From the comments in my presets.
// "01" references the file at "Duimon-koko-aio/zzz_global_params/Local_Shader/01.slangp".
// This file can be edited with the path to a base preset that may not be listed here.
// In addition, you can create your own file (Using the "01.slangp" as a templete.)
// and name it with any number above 21.
Copy the “01.slangp” to a 22.slangp file in the same folder and add a path to your chosen base using the existing lines as a guide.
Then follow the instructions above the lines I posted, using “22” as your reference.
This will override things locally.
Alternatively…
…to globally change the reference… edit the file at…
\Duimon-koko-aio\zzz_global_params\Base_Shader\CRT.slangp
It is possible that I will edit this “CRT” file in the future to add more preset choices, so be sure to back up your copy for future reference.
This assumes you are referring to alternative kokoko-aio base presets.
If not, you need a simple preset without a top reference line.
Then edit the aforementioned “CRT.slangp” file and add a reference to your simple preset. (Placing the simple preset in the same folder is the easiest method.) (You also need to comment/uncomment the appropriate base preset to match the one used in your simple preset.)
Alternatively…
Keep your top reference line, comment out my uncommented line, and add your reference to the top of the file. (Make that your path is either absolute or a correctly formatted relative path.)