Did I miss something? - Question about included planes

As I look through the downloads for Flight Simulator 2004, i notice something odd. There texture fixes that make textures that would be displayed blurry using the textures "as they come in the box" for several planes. Thing is, last time i checked, many of these planes DID NOT come with my copy of Flight Simulator 2004: A Century of Flight. Was there some sort of deluxe version that had more than the fairly small number of planes my sim came with? maybe some official add-on pack? I don't know.
Can anyone give me an answer?