You can find the freeware addon on simviation's website
http://www.simviation.com/fs2002military39.htmOddly, this was designed for FS2002 but seems to work fine on FSX including reflections and moving control surfaces.
Includes VC and panel, although I didn't include the gauges on my FSX gauge file, fearing that it would cause it to crash. The VC is still visible including a static panel and gauges.
In order to achieve an altitude of 200,000ft +, you will need to limit the fuel tanks to 2% which will last the assent.
Annoyingly the X-15 takes off from any runway and isn't historically jettisoned from a B52, although this can be simulated some what using slew mode to the correct altitude.
The Haze is visibly above 350,000ft implying that the atmosphere is beyond 350,000ft.
I've seen pictures from space missions of the atmosphere at this altitude and I can say that it is much thinner than that on FSX.
Therefore I want to edit the atmosphere in FSX, if possible. And lower it to something that would make it aesthetically pleasing.
8-)