Installing DLC on the Vita3K emulator typically requires you to package the content correctly so the emulator can recognize it as an extension of the base game. How to Install DLC on Vita3K
Always check the Vita3K compatibility list before attempting "vita3k install dlc" for a specific title. Many games have perfect DLC support; some have partial or broken support.
Compression: Select all three folders together and compress them into a single .zip file.
He launched the game again. This time, as the title screen faded in, a new notification chime rang out—sweet and high-pitched. A message box appeared: "New downloadable content detected."