How to save the images below as Desktop Wallpaper

Windows:
Method 1:
In Internet Explorer, right click on an image in your browser and select from the popup menu "Set desktop background" or Set as background”. The image will now become your background image. Done.
Method 2:
Download the image to your hard drive to where you desire it to be stored by right clicking on the image and choosing "Save Picture As:" from the popup menu in Internet Explorer. Next, right click on the desktop itself and choose "Properties" from the popup menu that appears. After a window called display properties opens, click on the tab named "Desktop". Now click on the button "Browse" and select the image you just saved. Done.

Macintosh (OS X):
Saving the wallpaper images:
The easiest way to do this is to drag the image from your browser to your desktop. If you have a two button mouse, right click on the image and select Save. Otherwise, hold "control" + click on the image, and then select Save from the popup menu. (Even if your browser calls the saving option something slightly different than "Save", the end result will be the same.) Next, select a place or directory on your hard drive in which to save the image file. I suggest that you place your images for the desktop in the Macintosh HD> Library> Desktop Pictures folder. You can actually save them anywhere you like, just be sure to remember where you put them.
Opening your Desktop Preferences:
Click on the Apple menu in the top left corner of your screen, and select the menu item "System Preferences..." In the personal section of the preferences, choose "Desktop".
Method 1:
Drag the desired desktop image into the "Current Desktop Picture" area in the Desktop Preferences pane. Done.
Method 2:
Select an image by choosing the pull down menu called "Collection:", selecting "Choose Folder", and then choose the folder in which you placed the background image. If your placed your image into Macintosh HD> Library> Desktop Pictures you will find that your image is already an icon which can be selected from among the pictures in the "Collection:", "Desktop Pictures". Once you select the icon, your desktop background will be changed. Done.

Macintosh (OS 9):
Saving the wallpaper images:
Save the background image to your hard drive by holding down control + clicking on the image, choosing Save from the popup menu. Or, drag the image directly from your browser to your desktop, and then move it to the desired location on your hard drive.
Open the Appearance Control Panel
Method 1:
Right click or control + click the mouse on your desktop and choose to change the desktop background. This should open the Appearance Control Panel.
Method 2:
Go to the apple menu in the upper left corner of your screen. Choose Control Panels> Appearance. After releasing your mouse, the Appearance Control Panel will open.
Next, select the "Desktop" tab.
Installing the Image
Locate the image on your hard drive and drag it into the gray representation of your screen. If you have multiple monitors, you can even drag a different image into each.
Finishing up
Click the "Set Desktop" button. Done.

Available in three sizes depending on the size of your desktop. Click on the size link and follow the instructions above.

Granite Island
           640 x 480     800 x 600      1024 x 768

Lake View
           640 x 480     800 x 600      1024 x 768

Morning Mist
           640 x 480     800 x 600      1024 x 768