if anyone feels the way i felt about the original linux distro(i'm using fedora)login screen,which was eventually very boring
than it is very help to change your login screen.
to change your login screen first make sure that the image which you want to put as login screen is located in...
.....because you will not be able to access your home folder
when switching to new login screen...
then follow these commands
1)login as root in the terminal