Hi Darcy, right all you have to do is copy the unzipped aircraft file into CFS3/aircraft directory. If there are any additional gauges, guns, effects etc, those should be copied into the relevant directory in your CFS3 root directory. There is normally a readme file in the package to tell you what to do. Happy killings.
Ozzy
There are two types of aeroplane, Spitfires and everything else that wishes it was a Spitfire!