The default Fedora 11 graphics were definitely not to my taste - so here is my new login screen (see attached image).
Ok - Attachments don't seem to work - here are the links to the image - choose your download size:
It is really just an assembly of available graphics. I am using KDM as the login manager and Gnome as my desktop. The background was downloaded from http://www.wallpaperlinux.com
The kdm login window is a mild hack of the fc10's Solar Mania theme.
The following lists the steps I took to change the login screen. All directories and files must have root ownershiip and files must be chrooted 644
1. Make a new directory in /usr/share/backgrounds e.g. /usr/share/backgrounds/custom/custom1
2. Copy the relevant directory structure from /usr/share/backgrounds/leonidas/lion to /usr/share/backgrounds/custom/custom1
3. Resize your background image with gimp - place in the appropriate directory and in addition make a png file as well as a jpeg.
4. Copy /usr/share/backgrounds/leonidas/leonidas.xml to /usr/share/backgrounds/custom1.xml and edit to change the name of the paths and the image files.
5. Now go to /usr/share/kde4/apps/kdm/themes and create a new directory .- custom1.
6. Copy all from /usr/share/kde4/apps/kdm/themes/leonidas to /usr/share/kde4/apps/kdm/themes/custom1
7. Copy the loginbox.png and imputbox.png from /usr/share/kde4/apps/kdm/themes/SolarMania to /usr/share/kde4/apps/kdm/themes/custom1
8 Rename the files to your taste and edit the paths in KdmGreeterTheme.desktop if you do so.
9. Edit the font color codes in /usr/share/kde4/apps/kdm/themes/custom1/leonidas.xml (or whatever you have renamed it to) to work with the new theme.
10. Edit the symlink @leonidas.png to the path of your new image - eg: /usr/share/backgrounds/custom/custom1/normal/2048x1536/Ocean_Blue.png
11. Edit /etc/kde/kdm/kdmrc and replace the line:
Reboot and login with the new screen - or test it with Xephyr (I found this better than Xnest on FC11).
Perhaps some kind person might write a script and gui to automate all this. It is a shame that there is not a login screen configurator in Fedora.