Add on aircraft textures

[whirlwind 10]

FSX/FSX-SE/P3D Douglas C-47R Sky train V3.12 Beta
I am trying to add a new texture to the above a/c I get the following message
c:\programe files (86) Microsoft games\Microsoft simulator X\simobjects\airplanes\Douglas c47_v3.12Beta\aircraft cfg.txt
You don't have permission to save in this location
Contact the administrator to obtain permission.

I am the administrator and I don't have a clue what to do

[pete]

This is due to default properties of the folder where FSX is installed. You can change this with a right click/properties. Without changing folder properties you may find it easier to move the aircraft to a temp folder, add the textures, then move the aircraft back into the FSX Simobjects\Airplanes folder.