Welcome to "Extras" they are extra cleo mods that add more features to the Airbus A340-600 
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Contrails Folder
"A346contrails.cs" -> Adds contrails at high altitude
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Real name folder 
"at400.fxt" -> It replaces the name "AT400" with "Airbus A340-600" 
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Searchlights folder
"A346_lights2a.cs" and "A346_lights2b.cs" -> Adds landing light effects by pressing H key, but they are glitched
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Wing effects Folder
"A346_wings.cs" -> Adds wing condensation effects on wings when you gain some speed
"Effects_required" -> You need to install this in your modloader foler or wing effects won't work!
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Move folders to modloader or copy all of them in the same folder of Airbus A340-600 in Modloader!