Here is the basic config.

In this config , there is no added material defintion to both weapons and units
so it is the exact same OFP lights, it is in case you hate the sun light reflecting on weapons.

You can use this config by overwriting the config.bin that is at 
...\@DMApackARMY\Bin\ 
by the one that is in the NoMaterial Config" folder you found this readme.txt in

Remember to back up the default Army Pack config.bin if finally you don't like the no material lighting effects.

As simple as that,
Sanctuary

Note : an editable version of this config is inside the Edit Version folder.

The config found in the "FullMaterial Config" folder has the TextureToMaterial section of the config defining new lighting for :
-the weapons
-the vehicles/aircraft
-the units 
It makes them "shiny", following the lights of the OFP sun.

The config found in the "ExtraMaterial Config" folder has the TextureToMaterial section of the config defining new lighting for :
-the weapons
-the vehicles/aircraft
It makes them "shiny", following the lights of the OFP sun.

The config found in the "NormalMaterial Config" folder has the TextureToMaterial section of the config defining new lighting for :
-the weapons
It makes them "shiny", following the lights of the OFP sun and it is the DEFAULT config used in this Army modpack (so use it in case one of your replacement goes wrong).

The config found in the "NoMaterial Config" folder has the default OFP lights on weapons and units in case you hate the sun light reflection on weapons.

The config found in the "ECP Config" folder has the whole modpack ported to ECP 1.085, refer to the installation instructions in the readme.txt to avoid problems