FF6, How to play it using custom mp3 replacements for each zone.

Short answer:
Turn down the sound on your TV/in your emulator, and play the new tracks in iTunes (or your audio file player of choice).

Long answer:
Unless I'm drastically wrong about the limitations of the SNES hardware (real and in emulation), those threads are going to be useless for what you're looking for. It is possible to inject custom music into a ROM, but because of the nature of the SNES/FF6 sound engine, I don't believe there's any way to use MP3s. Keep in mind that the SNES rather predates MP3s -- the MP3 format wasn't even properly released until 1995! (At least, so says the Almighty Wiki.)


You might -- might -- have some success looking at the GBA release; there's a music patch for that version (I think exclusively for the EU release, due to ROM sizes) that I believe includes an imported MP3 for the opera sequence. That said, you again run into the issue of ROM size; ROMs can only be expanded so far before they start crashing. You might have room for one, MAYBE two of the Balance and Ruin tracks, but definitely not the whole package.

The only other alternative I can think of is the under-development FF6 SDK. You can find it here: http://www.hbgames.org/forums/viewtopic.php?t=10208 It's not, to my knowledge, anywhere near finished yet, but it's the only thing I can think of that would allow custom MP3s for FF6. Of course, you'd have to wait until it's finished...

All that aside, I also question if the tracks (while incredibly awesome) are appropriate for in-game use, in terms of how easily/effectively they'll loop smoothly.

ETA: I take it back. If someone were to take the source of this and adapt it for FF6, that could work (although then you still have to deal with the aforementioned looping issues). I'm not a C++ coder or I'd take a look at it myself.