I've done abit of research on this particular problem and can't find a solution anywhere, only found one mention to this problem anywhere and that wasn't answered.
So anyway i load up PSX2PSP and load up all the files etc i want compiling with popstation. Then when i click convert the progress percentage goes in reverse. It goes to about -250% then stops. I have a .pbp at the end but it just doesn't work. I had this problem compiling FF8 and suddenly it worked but i tried everything and nothing seems to sort it for FF9.