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.
Just Flight reports that their ‘Spitifre and Tempest’ and ‘G-44 Widgeon’ are now FSX and 'Vista compatible' (Although nobody knows what the latter exactly means. Ed). ".....We can now confirm that two more of our download products are now fully compatible with both Flight Simulator X and Windows Vista.....".
"....The 19Mb Spitfire and Tempest double pack is available for £10.99/€15.95/$18.99 and the 13Mb G-44 Widgeon amphibian is yours for just £7.99/€11.95/$13.99. Both add-ons are still compatible with FS2004, and you'll find detailed specs and screenshots on the product pages....".