There was a group that was trying to make a playable ffx for the nes; They released an .exe were you could go around on a worldmap and not much else, but they had a ton of pictures of screens, and it looked pretty good. They did a nice remake of the To Zanarkand theme that played, apparently also the intro music when you start in zanarkand kinda meshed with Prelude.
http://www.snowy-day.net/stuff/others/00.mp3
http://www.snowy-day.net/stuff/others/01.mp3

sadly the last time I checked, the project was pretty abandoned.