format Skyboxes, Yoshiboy, Data folder modular
Also, is it possible to alter the worldmap skybox so it changes with the time like in battles?
It is kind of possible, you have to create a party with the sky box for the mesh and have a trigger that constantly makes it re-locate to the player party. The problem with this is that it disappears when the player party is not in view. Essentially going back to normal. You can then switch this party for different times of day.
Last Question at thread here
Some info bit, cmpxchg8b, Skyboxes.txt partially explained