Any fsx add-ons that download for you without doing anything extra exporting files etc I would like one to be able to just add a plane into fsx for you

The term used is an "Auto Installer". Which means that when you download a FSX addon it will install itself without you needing to paste folders around manually etc.

Its not easy finding these Auto installers Addons try http://www.flightstick.org or http://www.flightsimworld.com thy have some good downloads.