no bother.
First you need to find the scenery you want. Click on the link to download this and open the zip folder when it has downloaded.
Next check to see how they have put it together. Some scenery has an installer. (.exe program)
Most dont but it should contain a main folder, with subfolder.
You place this folder in the Addon Scenery Folder.
Switch on FS9, click on 'settings', click on 'Addon Scenery' and finally click to add another piece of scenery.
When chosing the file, pick the main folder (which you placed in the 'Addon Scenery Folder' ) and click open.
This should work fine once you have restarted fs!
REMEMBER: ALWAYS READ THE README, IT TAKES TWO MINUTES OF TIME AND ENSURES YOU ISTALL THINGS PROPERLY

hope ive been some help. Ant 8)