I suggest you to install midnight commander.
Then type in a terminal: "mc".
Watch the structure of the /dirs
Look inside /usr
In /usr/games you can find fgfs. With the pull down menues of mc you can see, in the other hand, the permission of this file. Because it's executable have green collor.
If u come back where is the fligthgear.rpm and press enter over the file you can see that it have an structure inside it. There u can see where will go "Atlas, Scenario, data", etc when you install it. Then, as u have been yet installed the package you can find inside 'your' /usr/share/games/Flightgear/data the same
Well: when you press enter over the news tarballs you can find differents Scenery. Puts its manually inside the above dirs
Uff...english is not my native language. Is my hope that u can understand this first steps in Linux
Another questions? I suppose that a lot...
Well. I'm waiting ...