Thanks for that. Are there not changes to cfg files to be made - like ui_manufacturer and stuff?
Some Aircraft.cfg entries are slightly different but they appear to work without a problem. If you wish to keep the aircraft after trying it you could edit them at your leisure using any default Aircraft.cfg for reference. Some FS9 aircraft have display problems in FSX depending on which updates you have installed. To finish the job take a screenshot of the aircraft in FSX, resize it to 250 pixel width & save it in JPEG format as Thumbnail.jpg. Pop this into the Texture folder of the aircraft for the image to display on the FSX selection menu. Again, you can use the default aircraft for reference.