Hi there!
Most default Windows wallpaper is located in C:\WINDOWS, as .BMP
files. However, if you're using 98 or later, and you've turned on
Active Desktop, you can also use ANY image in your C:\My Documents\My
Pictures directory. so locate your file then e-mail it to your self then collect it put it in my pictures
then
right click anywhere on your desktop background to call up the
Properties menu. Select the Background tab, and you'll see the list.
Just click the one you want, click Apply, then OK.