Trying to transport some EB units to vanilla... and...

I'm really pissed off with this.
Let me explain a little bit what I'm doing this last days... I'm eliminating units of the original game and using EB units in their place.

So... I simply copy the textures and de models_unit (skeletons added to the vanilla game) and the UI to their respective folders in the original game.

Hastati, rorarii, triarii, principes,accensi...

So far so good, they are all in the original game, so, let's try giving birth to the roman leves unit.

Same process. Copy files from EB's folders to vanilla's folders modifying EDU, DMB... done.
I start the game and try to play a custom battle. Fail. It won't start
The game can't find "ebunit_Prome_new_unit_iberian_skirmishers_rebel.tga" in models_unit/textures.
At that point I'm confused. there's no line in the txt that says "hey RTW, try to look for that file in textures!". Awesome. Even better when I go to EB/Data/models_unit/textures and the file isn't there either.

And no, I don't know what to do because the game tries to find something which doesn't exist. It doesn't even exist in the EB game!
The best part of all this is that doing every single step with other units works fine. Not with Leves, they hate vanilla. I guess they feel unmodded.

Same happens with barbarian generals / lesser generals. C'mon, it's really frustrating.
I will apreciatte any help.