How to add unit to faction?

[AQUILIFIER]

Hi, first I want to state that in my opinion this is the best mod for total war game ever! Thank you guys.
I recently started a campaigh with the Bosporan kingdom, but for my dissapointment I noticed that they cannot recruit tracian hippeis and chosen hippeis. So this is my question: how to add this units in the mercenary building (which i prefer), or in the nations barracks? Please help

[Spartan999]

Here you go, I put in the national one cause I am too lazy to bother with the mercenary one.

Change.zip

[AQUILIFIER]

Thank you!