We currently offer a massive range of downloads for FSX, as well as older flight simulator add-ons for the ever-popular FS2004, FS2002, CFS3 and now becoming ever popular with dediced virtual aviators is Laminar Research's X-Plane series.
there is no better program to install aircraft, panels, sceneries, anything, then Addit! Pro. you can download it, install it and use it for 30 days for free, if you like it, register it on line, pay for it, under $30.00.
Very simple to operate and to install into your flight sim anything and everything.