Slight Problem with unit cards

made a new unit with skin, british skirmishers

i tried to make a new unit card by editing the gaul skirmisher one, and i saved it in the brit folder and saved it as the units description name in export_descr_unit. however, the unit still has the default black peasant card. i think the problem might be the way i saved the unit card. for the first bit (photoshop btw), i saved the unit name properly im sure, but in the save option below what should i put, .dds or normal photoshop or whatever? in the next save bit that comes up i saved it as 32 bit and compressed.

so what am i doing wrong?

As far as I know, unit cards are in tga format. For further info on unit card editing, look here:
https://forums.totalwar.org/vb/showthread.php?t=51373

Yep, save unit cards as tgas. When you saved it as the descriptions name, you mean the dictionary name? That's the crucial part. A straight copy of the Gaul skirmisher would mean you save it using the same name, just in the Britons folder.