via http://www.romhacking.net/utilities/914/

FF4kster, the all-in-one editor for Final Fantasy 4 has been updated. Some bugs have been fixed, including some errors with some of the menus, as well as some bugs related to the saving of NPCs.
In addition, you can now edit the game’s dialogue. This includes all three dialogue banks, as well as the battle messages and status names.
Furthermore, two config files have been added: one for NPCs and one for NPC sprites.
As well, the program can now handle unheadered roms as well as headered ones (but can still only handle FF2US v1.1).