It's most probably a corrupted file. Just buy it for PSX again for like $10 and download this:

http://www.epsxe.com/download.php

You need to download different plugins

http://www.ngemu.com/psx/epsxe.php?action=plugins

once you get all that stuff set up, it almost runs the game perfectly.

Not sure about FFIX, last time I tried to run it it didn't work very well.