I have all of my favorite PSX games converted to pops format... but I don't have ANY FF games at all.
Among my favorite PSX games on the PSP:
Tomba!
Rayman
Gex
Jumping Flash!
Doom
Destruction Derby
Ten Pin Alley
Ridge Racer
Tomb Raider
Tekken
Tekken 2
Battle Arena Toshinden
Road Rash