If you downloaded them from AVSIM.COM, it would be quite easy.
Just go to your scenery file of FS2002 and make a new file in there with any name of scenery. For example you would install a scenery for DUSSELDORF AIRPORT, just name the file DUS
AIRPORT (any other name also will do). After doing that extract the Scenery files with WinZip software into the new file.
Than start your flight simulator and in the settings section just add the new scenery.
Sorry for my bad English...Anyway, I hope it'll help.
fly Korean Air ....