To set up a mountain launch use the slew controls to position the glider at your desired launch site and hit "P" , take note of the lat and long ("shift+Z" top left-hand corner)and the compass heading .
Now reset the flight and select "World">"weather">"user-defined">"advanced">"wind" make sure the wind envelope extends higher than the launch point and enter the desired wind speed (light to moderate) and the direction .
Now select "World">"map" and enter the lat. and long. [eg N28 26.14 ; E84 38.13 ] and airspeed 0 , there's no need to bother about the height.
Set the heading the same as the wind direction, "ok" all that...phew , and you should appear at the launch at a standstill ( PS. If the screen goes black you have arrived at night ! ),just open the throttle and off you run.
If you save the flight when you appear at the launch it will save you having to repeat all the rigmarole and you can compile a file of launch sites .