I've been working on this for several weeks now. Started out as "getting the Chrono Trigger DS script into the SNES game", but keeping the nuanced lovable translation and simplicity of the original (I.e: CAPS in people's names, CAPS in some phrases when people speak, Frog's accent).
It evolved a bit. Not just cleaning and going through every line of dialogue, correcting the line's speaker, the tabbing, seeing where it's used in the game, fixing translation mishaps the original had (with the help of the DS and SNES scripts, and help of Chrono Compendium's translation document.
Apart from that, scenes were added that add a bit more interaction between the characters and NPCs (Lucca and Melchior, for instance). Nothing major, but small things here and there to make the journey more worthwhile, and explore having different characters in your party.
Last, and bigger in scope, more direct references to Chrono Cross story; the Frozen Flame was added as an element in Zeal, and a possibility of what could have happened with Schala, Zeal, the Flame, Dreamstone, the Mammon Machine, and the Gurus. Mostly Chrono Compendium based, but also a bit of my own (original-material based) theorycrafting. Look out for the references, and figure out how the Ocean Palace incident and the fall of Zeal are explained in this version!
The core gameplay is kept from the SNES original, with mostly SNES original names. No extra content from the DS version added.
So... give it a try. What do you think?
Feel free to ask me what got changed, what you would want added or removed.