The all-in-one editing tool for Final Fantasy 4, FF4kster, has received another update. In addition to the usual bug fixes and minor improvements, the highlights are as follows:
The event editor has been cleaned up quite a bit. It now can preview Bank 2 messages as well as NPC placements. It will even dynamically update said previews when the event contains a teleport instruction.
There is now a solobattle editor that allows you to edit the details of battles that hide particular actors or hide all actors except particular ones.
Furthermore, the command editor now allows the editing of far more details of battle commands.

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