Modding Unit Graphics ; Advanced Genie Editor - Turtle Pack : AOE2 : 2019

Regarding Graphical Modding of AGE of Empires II units.

i am assisting someone with visuals for new units they have in mind -
they have data modded some of the civs and produced new civs in their place..
I noticed they had no new graphics, so i opened my mouth to help i have some skills in 3d , and i love the game --
this is aimed at doing their unique unit skin / actions etc----
That is my part of the process - However , though these fellows have used genie for their work ,

they seem not to know about the part that I need --

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I am looking to chat with anyone who has experience using Advanced Genie Editor to prepare graphics for the game.

I have begun by inspecting the files inside genie -

then opening the SLP files in Turtle pack - Sample files are provided - so have played around with exporting the images , editing and re-importing.
I have not edited game files yet - If i make changes which fail , i can just re-install, but i'd rather not.

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There is plenty for me to in the 3d workflow - So I'm scouting for an assistant at the Genie end.

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