Those are textures only for the default Douglas DC-3 painted in the Altair
Virtual Air Service Inc, livery from the 1930s period. All you have to
do is unzip the package into the default Douglas DC-3 folder and add the
content of the readme into the aircraft.cfg file. Detailed step-by-step
instructions are included in the readme file.
ENTERTAINMENT PURPOSES ONLY
WARNING: THE CONTENT FROM THIS SITE IS NOT
INTENDED FOR ACTUAL AVIATION USE