Final Fantasy Tactics: The War of the Lions ULUS10297

[Alxander]

Does anyone know where the codes or the basic formula is to create a custom job are? Or maybe tweak an existing job?

Also, what about custom spirits for certain characters?
Changing the brave, faith, name, zodiac sign for certain characters?

I have all of this for the old PSX version but can't seem to find it for the PSP.