How to change the login screen wallpaper on Fedora 14 Laighlin?

Honestly, I don't like the Fedora Laughlin wallpaper, but I  just could settle for change the desktop wallpaper, but the login screen is always the same.
But  I found a way to solve that, apparently, the dialog used to change the theme, the background and that stuff can be used to change the login screen, just that we have to make a few settings for it in the terminal
The first thing you have to do is to copy our wallpaper to the /usr/share/backgrounds

 #cp <directorio de la imagen> /usr/share/backgrounds

For example:

#cp /home/HakS/wallpaper.png /usr/share/backgrounds

After doing that, run this command

#cp /usr/share/applications/gnome-appearance-properties.desktop /usr/share/gdm/autostart/LoginWindow

This command copies a configuration file that represents the dialog used to change wallpapers and themes which can only be executed when the session started. When we copied it to that directory, the same dialog will appear every time we log in, thus allowing us to change the login screen wallpaper as if it was the desktop wallpaper.

In order to prove this, logout. As you can see, the dialog shows up, as same as if we would like to change the desktop wallpaper.

Use the dialog to choose a wallpaper, and that's all, the wallpaper will change. After doing that, just close that dialog and log in.

But  remember that when we copied the file, I tsaid the dialog will be displayed whenever you start session ... That sounds rather uncomfortable right?
We can take the dialog just deleting the file we copied by running the command rm

#rm /usr/share/gdm/autostart/LoginWindow/gnome-appearance-properties.desktop

And that's all folks! xD we have oue beautiful wallpaper : )