To change background of login: https://launchpad.net/~meerkat/+archive/stable
use this app.
How you change the window itself...i dunno...the options as described above did not work for me..
got errors

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1- sudo cp /usr/share/applications/gnome-appearance-properties.desktop /usr/share/gdm/autostart/LoginWindow
- Visitor 1 year 23 weeks ago2- logout
3- And then change the backgroud
First take ownership of the xsplash folder, then you can change the file-name.
- Visitor 1 year 30 weeks ago