Using SPECIAL-K.
Setup SPECIAL- K first: Getting started | Special K - The Official Wiki (special-k.info)
Extract archive to your Special-K installation
C:\Users\%username%\AppData\Local\Programs\Special K
Add your game to Special-K if you haven't already done so (automated process)

If you click on "Centralized", it will open Special-K path directly to the profile folder you're using to load textures in DXM.
Launch your Game!
Open Special-K OSD with: Ctrl + ⇧ Shift + ← Backspace
Then Reloads all injected textures
(See the screenshot)
You have succefully loaded DualShock 4 Button Prompt!