^ What he said.
It is “kinda” doable, but not recommended, and most case, not needed.
You can keep the file name as original, and rename it to however you like, as long as it matches in the .art file.
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Class Mods
NEW: MARTYR, CANNONEER, COURTESAN | UPDATED: Assassin | Pit Fighter | Surgeon Mesmer | Trap Maker ( Still need work: Shield Miaden )