Well, first you should edit the texture file, by takign a previously working one we'll sya AIr France, copying it, and taking it out of teh FSX files. Then you take the purolator one seperately, and take all the Air France files, and replace them with the ones of the same name. Then rename the texture and try it. Also, try to make sure the info in the aircraft.cfg fiel is correct, sometimes developers of these repaints forget to put the corresponding feel with the texture option in the .cfg file for that specific texture. These both work all the time

Good luck