Many of these skins were designed for Windows 95/98 environments. If you are running the game on modern hardware via DOSBox or wrappers, ensure the file paths match the emulated drive structure.
This is the second iteration or a specific part of the "ATFPack3" series developed by the community member "Wiler." Typical Contents Wiler.ATFPack3_Skins.2.rar
Most likely the Jane's Combat Simulations title Advanced Tactical Fighters or its expansions ( Gold , NATO Fighters ). Many of these skins were designed for Windows
While specific contents vary by pack, these archives generally include: Wiler.ATFPack3_Skins.2.rar
Parameter files that tell the game engine how to map the textures and what properties (like reflectivity) to apply.