may be i don't understand but
if you wanna emulate gba with you're psp
you need fw 1.5 not 2.0
if the game is on umd
requiered 2.01+ fw:
you need upgrade your psp
requiered 2.0 (it's ok for you)
you must downgrade to 1.5 if you want use iso game
Enjoy and sorry if i don't understand what you say

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