Those are textures only for the default Ford 5AT Tri-motor painted in
the Altair Virtual Air Service Inc, livery from the 1920s period. All
you have to do is unzip the package into the default Ford 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