Edit: Post-Processing Initialization failed.
But, the creator of Xbrz made an epsxe plugin that looks fantastic on 2d games such as Megaman X4, but messes up the textures on the models of FF9. I haven't tested it with 7, but it might be different than 9 because there are no textures on the models, just lots of gradients. I have a PS1 copy if you'd like me to test it quickly.