How do you get the Sailplane to fly in Microsfts FS 2004??

Answer 1

I think there is a launch or take off option that has you towed into the air behind another plane and a release lever, but I can't check on that.
Microsoft says that in 2002 version, you cheat
http://support.microsoft.com/kb/837883/en-us?spid=1822&sid=1498
by throwing yourself in the air or changing planes after taking off.