I've learned a LOT about hacking graphics and using utilities from my Final Fantasy Reconstructed project. I just wanted to post 1 warning:
DO NOT ALTER THE EXITS IN THE TITAN'S TUNNEL!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
Although I'm going to write an FAQ about hacking Final Fantasy since I've learned everything I know now about hacking from this project, I just wanted to save other people the headache that comes from accidentally altering THOSE exits. I'm using the FFHackster utility, which allows you to recreate the levels and sprites, and essentially will change game related code for you. I accidentally messed with that exit early on and had to scrap an entire project because I couldn't figure out how to fix it. I actually had to create an entirely new exit routine and entry coordinates to get it to work, otherwise you warped right outside of Coneria city and back to the Titan's tunnel, making it a loop that you couldn't escape from. After 2 hours I fixed it, and I will be happy to help anyone else who has the problem. But if you don't alter it, it won't happen. Just change the tiles AROUND the exits. I hope this saves others the hassle.
Duke