I have just bought the PMDG 737NGX for FSX. When I try to install it, there is an error: unable to locate fsx.exe, unable to install. I have already tried the tip given by others, to run trough the registry repair tool (http://www.flight1.com/view.asp?page=library) How am I going to fix this? Is there a way I can manually select the fsx.exe file in the install program? Help is much appreciated. Kind regards, Jeffrey.