Hm, I`m unsure what you meant by "unlocking" the throttlebutton, but after tangling with the settings for a time, i got it working :
All options settings off (cpu etc. , except ofcourse FF9 fix), frameskip off, framelimit on, old frameskip on, throttle fixed. Works for me!
And if there`s some slowdown in battles, push x (xbox that is).