Hi Mike,
Which repaint was it supposed to be?
You have to follow the readme installation guide very carefully, and make sure that, after creating the root folder for the new roadname, you copy the engine from ATN Weathered and the tender from "ATN on Tender" (not from ATN Weathered ... the reskins rely on having ConsolidationTenderNoSideNumbers.GeoPcdx in the Tender folder). Copy the texture folders too. The last step is to unpack the rwp, which will overwrite the files you've already copied.
From the looks of it, you might have missed out step 4:
Copy the contents of
C:\Program Files (x86)\Steam\steamapps\common\railworks\Assets\Smokebox\Consolidation\RailVehicles\Steam\Consolidation\ATN Weathered\Tender\textures
to
C:\Program Files (x86)\Steam\steamapps\common\railworks\Assets\Smokebox\Consolidation\RailVehicles\Steam\Consolidation\(new roadname)\Tender\textures