Actually I think that all the PAL Final Fantasy games had Libcrypt protection on them so if you just rip your disc with the subcode by doing either a CloneCD (ccd/img/sub) or Alcohol (mds/mdf) image dump of it then it should work without patching. Libcrypt stores it's special code in the subchannel of the disc and if the code is not verified when it reads it then the game will freeze which is probably what is happening in pSX since it is made to emulate the PlayStation as accurately as possible right down to the exact processor and memory calls that the real system runs.
