Changing recruitment

Say, i want to add to add the best HA unit in the game to AS. I add them to export_descr_buildings.txt (adding them to my barracks) and export_descr_unit.txt (adding the faction on the bottom). After that i have to add the sprite, model and unit card. In what files and where do i edit those last 3 things?

Thanks!!!

Oh, anyone know the best armored HA unit in the game?

Sprites, model/skin are in the descr_model_battle.txt and the UI changes involve simply copying files within the "...\EB\Data\UI" folder.