Restoring the texture of Renegade Knights from Hammers of Fate.

Hi everyone, I'm new to your forum and I need some help.
I recently remembered that I once played the expansion for Heroes 5 Hammers of Fate and realized that I prefer the old texture of the Renegade Knights from the expansion

more than in Tribes of the East.
specifically.. without the flag, and with a Shield instead.
Anyway, here is the gist:
I was digging through the Editor files, trying to replace the textures using model files from the Hammers of Fate Editor
and what happened was that instead of the flag being replaced by a shield, the flag simply took on the texture of the shield itself.

and this is where I need your help.. I want it to be just like in Hammers of Fate


also... there's a question: can this be done as a mod (.h5u) or as a file that needs to be copied into the data folder (.pak)? :3
Thanks in advance!)