Here's how you get the files necessary to run PS Vita homebrew that uses FMOD; for example, my port of Geometry Dash.
- Legally obtain one of these games. It doesn't matter which one you pick; all of them should work fine.
- PCSE01426
- PCSE01188
- PCSE01010
- Install (if you haven't already) and open up FAGDec via VitaShell.
- Scroll down to and select the game you installed (for example, PCSE01188 = I Am The Hero.)
- Let it finish looking for the modules and select the path that ends with
libfmodstudio.suprx
with X. - Press O to go back to the main menu, press START and select
START DECRYPT (SELF)
to start the decrypting process with START.