Reversed textures on conversion

I recently have ripped few models from a game, but when i open it i notice that the texture is reversed...
The texture is inside the model, and the model is grey from outside....
I don't know how i can fix this problem
Anyone can help me? I have to reverse inside-out the surface of the textures, but i even don't know how is called this action...

I usually use AC3D , i have poor pratice with blender...
I can try also through other 3D related programs