Major Problem PLEASE HELP

I just downloaded the PMDG 737-800/900 today. So it downloaded perfectly. then when i ran the application it loads it into the main FS9 folder. but when installing it says the following"The file C:\Program Files\Microsoft Games\Flight Simulator 9\Aircraft\PMDG737-700\texture\pmdg_airstairs.bmp could not be opened. then the installation closes. then when i go into the aircraft folder it only installed the 800 model, not the 900. then when i opened the 800 folder, there were no textures under the texture folder, no sounds, and no panel. then it didnt install the continental textures. Could some one please try to help me. thank you.