I need help on my unit card!!!

Hey, I am a new guy here. ~:cheers: I have play this Total war from the begin of STW, MTW and RTW. For a long time I never try or thinking to remodding the game and recently I am learning how do it, but I got hold down by a very easy modding prossing which I read so many note and checking from the forum. I just too bad on this work(modding) :help: I finished most of the work(creating a new merc unit) but I really don't know how to set the unit card right so that it will show e in the game.

I used Greek elephant cataphract unit file to creat a new merc unit called merc greek elephant cataphract.

File look like this in export_descr_unit:
type merc greek elephant cataphract
dictionary greek_elephant_armoured ; Armoured Elephants
category cavalry
class heavy
voice_type Heavy_1
soldier greek_big_elephant_archer, 25, 3, 1
mount elephant african cataphract
mount_effect horse +4, chariot +8, camel +4
attributes sea_faring,frighten_foot,frighten_mounted,can_run_amok,mercenary_unit
formation 7, 11, 13, 16, 1,square
stat_health 2, 25
stat_pri 14,5, arrow, 150, 90, missile, archery, piercing, none, 25, 1
stat_pri_attr ap
stat_sec 11,13, no, 0, 0, melee, other, blunt, none, 25, 1
stat_sec_attr ap,bp,launching,area
stat_pri_armour 0, 4, 0, flesh
stat_sec_armour 16, 3, flesh
stat_heat -1
stat_ground 0, 1, -6, -1
stat_mental 8,normal,highly_trained
stat_charge_dist 30
stat_fire_delay 0
stat_food 60, 300
stat_cost 2, 2970, 590, 300, 450, 2970
ownership slave, seleucid

as most of us know that when you get into to game this unit is there but will show it unit card as "peasant", I want to used Greek elephant cataphract unit card as this new merc unit card, but I try so many time.(I fail) I really like to make it right, and I not good on using Photoshop, I wish some of you can give me full guide to help me to finished this project. Thank You!!!

Also can anyone of your can show how to change the unit color? For exmaple most of the merc unit is in color green in game(merc greek hoplites), how can I change it color to other color, can you guys give me a full guide too. Thanks!!!