I'd say try playing around with the rom using Temporal Flux. I've never used it personally, but I've used RPG Maker a good deal, and was often frustrated with it (even though I had more freedom with it, I always felt... more limited in ways).
I've never heard much of anything negative about the editor (like things raping your hard work), unlike editors for certain other games.
Just try playing around with it for a while, learn what limitations that the game has, and have some good ol fashioned fun!
Also, keep backups as you make progress. I usually make one before I begin messing around for the day, and make dated folders for them to keep everything neat. Cause sometimes horrible, horrible shit will happen out of nowhere and those backups are your bread and butter.
Not to mention that almost every device under the sun has a SNES emulator that can play Chrono Trigger, which would make your prjuct muuuch more accessible to others!