1 - I found this. It says:
All the symbols for all the Factions in their locations:
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Location: \data\banners
Files: (each file includes 4 faction icons per image: upper left, upper right, bottom left, bottom right):
symbols4.tga.dds (England, Portugal, Poland, Byzantine Empire)
Also in same folder:
symbols1.tga.dds (Venice, Sicily, Milan, Papal States)
symbols2.tga.dds (Denmark, Egypt, Scotland, Aztecs)
symbols3.tga.dds (Mongols, Turks, France, Holy Roman Empire)
symbols5.tga.dds (Moors, Russia, Spain, Hungary)
symbols6.tga.dds (Circles, Empty, Circles, Saxons)
symbols7.tga.dds (Rebels, Rebels, Rebels, Rebels)
symbols8.tga.dds (Rebels, Rebels, Rebels, Rebels)
Real File’s extension: .DDS
Usage of the file in game: Symbols of the Flags & Panels that keep the soldiers in Campaign Map.
My new faction is set as saxons, so it should read the symbols6 file, but it is actually reading the 5 one. I know it because I can identify the symbol from it in the stratmap campaign army banner.
So there is a text file that says where it should point or what?
2 - How can I have my faction in custom battles? In descr_sm_factions.txt I've set it as:
custom_battle_availability yes
But it stills does not show up in there. Maybe it is because I have not added any units for them yet?