I add as a unit RABBIT little withe and grey bunny.
It is an answer for everyone who asking about historical uniform for each regiments.
I have copy one unit folder, and rename it for ex. PrussiaRabbit, then I open in Gimp one file from this folder ex. PrussiaArtillery_line and deleted textures with crew and guns; then paste there small icon of a bunny. Then save.
Next step was rename two file (the same file were i change textures) PrussiaArtillery_line.tga to PrussiaRabbit.tga and rename PrussiaArtillery_line.txt to PrussiaRabbit.txt, If youdon't change txt file nothing will happened.
Last step is deleted UnitDefinitons.bin. Open editor and put there unit with PrussiaRabbit uniform
AND it is looking like that:








