I know this isn't the right forum but no one is on the 747-400 one. I have Win 7 Professional. I am trying to install the PMDG 747-400. I extracted the files and when I run the setup I get a message saying, "Installation cannot continue. Your registry does not show a valid FSX installation location" I only have FSX not FS9. This is REALLY getting on my nerves. I just spent $55 on this addon and I want to use it. Thanks in advance...