ok I will try that, there is no manual available with the Demo
There is, and it's accessible from in several different ways:
1) Under the Windows "Start" button, and Fsdreamteam group with a link to the manual has been created by the installer, like any other Windows program out there that creates program icons after installing it.
OR
2) By browsing the FSX\fsdreamteam\Couatl\GSX folder
The website says it works with a few default airports, I wish they would tell you what ones so I know for sure.
The website says it works at all FSDT airports in addition to some default airports. They are LIML, EDDM (both default or Aerosoft) and KSFO (both default or Flightbeam's) and it also works on the remaining airports from Flightbeam.
In any case, when you press the GSX hotkey, and you are not positioned on a Trial airport, a menu will tell you which airports are available in the Trial version, with the option to jump directly there.