Adding existing untis to other fractions with unit cards

[Monkwarrior]

I'm able to edit the export_descr_unit file and add a unit to another fraction like the silver legionaries to the greek_cities, but how do i edit or make it so that the unit card doesn't just show a peasent?

thanks

First of all, the unit cards are in a pak, so you must use xpak to get them unpacked.
The cards are in Data\ui\units\FACTIONNAME folders. The only thing you have to do is to copy the unit card in the folder corresponding to the new faction.
For the unit info picture it is the same, but in Data\ui\unit_info\factionname folders.
Good luck.