Copy PBOOT.PBP to base PSP game folder in ms0:/PSP/GAME/GAMEID/
Transfer PSP save to the Vita.
Backup and restore base PSP game with CMA/QCMA.
You should now have ARK on the Live Area where the original base game should be.
Now you can run PSP homebrew and games.
Enjoy ARK on 3.60. :)

To exit games and homebrew to the ARK menu, hold L + R + Down + Start.

this kexploit involves AES decryption/encryption
(using sceChnnlsv buffer in kernel RAM for fake thread UID)
for it to work with the threadman UID exploit. :D