Well I've been sneaking around my memory viewer figuring out how to change the job class names. I noticed that job names with no spaces (basically just one word) need to use these letters for them to work. I have successfully edited "Blue Mage" to "Spellblade". I added more memory in my rom and made a string and pointed it to the respective class.
Basically this is the format
Spellblade - 01 C3 DA CF D6 D6 CC D6 CB CE CF 00
I'm pretty new at modding and I dont know much of the terms and stuff so bare with me. I made this cause I cant get the text editors to work (ahaha)
Here are the letters: