Step 1: Create a new folder and name it texture.x The "x" will be whatever number you have avialable, such as, if your newest texture is texture.2 this texture would be texture.3
Step 2: Copy the folder "texture" into the folder "texture.x"
Step 3: Extract the file "fuselage_T" into the folder, when it asks to replace the original click "ok"
Step 4: Add these line to the aircraft.cfg folder
START COPYING AT THE FIRST LINE OF TEXT BELOW THIS
description=The AS 365 is a medium-weight multipurpose twin-engine helicopter. In addition to technological innovations (main and rear rotor blades made of composite materials, tail rotor built in the fin...), the reliability and availability of this helicopter are highly valued worldwide. The AS 365 N3 is equipped with two Turbomeca Arriel 2C engines which offer remarkable performance. This engine is equipped with an Full Authority Digital Electronic Control (FADEC).
STOP COPYING AT THE LAST LINE OF TEXT ABOVE THIS
Example: I have renamed the texture folder in "texture.5"
description=The AS 365 is a medium-weight multipurpose twin-engine helicopter. In addition to technological innovations (main and rear rotor blades made of composite materials, tail rotor built in the fin...), the reliability and availability of this helicopter are highly valued worldwide. The AS 365 N3 is equipped with two Turbomeca Arriel 2C engines which offer remarkable performance. This engine is equipped with an Full Authority Digital Electronic Control (FADEC).