Ouch... that's almost disappointing, and I don't say that to put pressure on you, I know that one person less not playing your mod has no importance.
Seriously, you are not bothered by a Federation Cruiser having Medic and the medic icon instead of having Repair Bay and a proper icon? This fails to suspend disbelief for me. A mod is about chrome and flavors...
Now I'm not demanding fundamental changes, just cosmetic one. Use icon X instead of Y, rename the name of Icon X to another name. That's all. There is no actual changes in gameplay and I believe this can be done easily for someone knowing where are the files and data like you.
I would like to, but in the PromotionInfos file there is no entry for the name of a promotion, the only text field is for example <Description>TXT_KEY_PROMOTION_MEDIC2</Description>
I know how to change the arts, with <Button>,Art/Interface/Buttons/Promotions/Medic2.dds,Art/Interface/Buttons/Promotions_Atlas.dds,4,4</Button>
Although I don't know why there are 2 references, is the 2nd a fallback image if the first does not exists?
So if someone can point me to the file which names the promotions, that would be appreciated. I guess there is some localization file somewhere for the mod, but where?