1, Install official release of flightgear 2.6 - installer works
2, Completely delete a content of direcrory C:\Program Files\FlightGear 2.6\bin\Win32\
3, Replace its contents with http://www.penguin.cz/~fojtik/flightgear/fg_win32.zip
This version is slightly bit more optimized to use SSE2 instruction set, so even XP and Windows 7 users could try it.
And the result you could observed here:






It would be nice if the file fg_win32.zip would be pushed to official flightgear ftp.