How do I change my wallpaper in windows XP ?

To change your wallpaper:

1.Right-click your desktop.
2.Highlight Properties.
3.Click the Desktop tab.
4.Select the wallpaper you want from the list that appears in the Background box.
Note: If you would like to display an image you created, you can click Browse to find the image.

5.Select how you want your image to appear on the screen. Choose from the following:
Center Place the image in the center of the screen.
Tile Have the image display as tiles across and down the screen.
Stretch Stretch the image so the image covers the entire screen.