You are right. By setting to off option "Enhanced Resolution (Speed Hack) in retroarch pcsxrearmed, I can see the world map again. So if anyone encounter this bug then this is what you have to do. By the way I didn't know there was a community around FFT and I am glad I can play FFT on psx with psp content (Seriously what kind of person confirm with a cross button -_-). You found yourself a new member.
Nisen
Nisen