You must remove any beta versions of the GNOME 2.0 desktop that are on your system before you can install the desktop. To remove a beta version of the GNOME 2.0 desktop, perform the following actions:
Log in as root, then open a terminal window.
At the command prompt type the following command:
cd gnome-install-directory/gnome-install
Where gnome-install-directory is the directory where you unpacked the installer.
Run the following command:
./remove