Mod requests (orders).

Dear friends! Please, could someone who knows how to create mods help me? I need a mod that replaces the Executioners, Chieftains, and their first-level upgrade with Gorgons from the Citadel mod. In that mod, they are a level 5 unit of the Citadel, but I need a mod that only replaces those specific units. All characteristics, the model, and everything else can be found in the link: http://www.mediafire.com/download/g3ok0fs06vkhvo8/cytadela_mod.zip
I would be very grateful!