Need help with transfering custom textures

I'm close to finishing a mod I've been working on. As an opposing unit to PDguru's Colonne d'Attaque, I've been working on an Austrian Battalion Mass unit using the texture and files from LME4's German fusiliers. Everything is just about right except for the textures of the helmet. I don't really understand why as I've taken the variant models and atlas files directly from LME4 and extracted them to a new mod. Renamed them so as not to overlap with the standard German Fusiliers in the original mod. Any ideas, suggestions & advice would be really appreciated.

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