I suggest reading the GSX manual first, which covers all basic usage, then come back here if there's anything not clear. The manual can be accessed in 3 different ways:
- Like any other Windows program out there, in the Windows Start menu, under the "FSdreamteam GSX" program group, there's a link to the manual.
- Inside FSX, after having selected GSX, by clicking with the "Open Documentation" button in the Addon Manager, which is a sub-menu of the FSX "Addons" menu.
- By browsing the FSX\fsdreamteam\Couatl\GSX folder