By the portraits I mean the little pictures in boxes used to select units on both the strat and battle maps. I know how to switch skins, but that little picture will still show the old design, which annoys me a little (nitpicky I know).
I will take a look at that alright, thanks.

Epeiros hellenistic med cavalry skin goes very well with Pontos methinks. Also, the Pahlava levy phalanx skin brightens up Pontic and Armenian armies.