LinuxQuestions.org - How to install KDE 4.3 RC 2 on Kubuntu?

So right now i am running KDE 4.2.2 on my Kubuntu 9.04 and on Kubuntu website i saw this..

Quote:

KDE 4.3 RC 2 Available Submitted on Sat, 2009-07-11 The second release candidate is out from KDE for the upcoming 4.3.
Users of the Karmic development release can upgrade to the latest packages.
Note that these packages still have a bug which causes X to die during the upgrade. The upgrade will continue and you can reboot when it is done.
Update: Users of our stable 9.04 release can now install it from the Kubuntu Backports PPA.
deb http://ppa.launchpad.net/kubuntu-ppa/backports/ubuntu jaunty main
It is strongly recommended that you verify the integrity of these packages by installing the archive's GPG key. You may do this by saving the PUBLIC KEY BLOCK available from this page to a file and importing it from the authentication tab in KPackageKit's software sources window.
Then refresh and do a full upgrade.

I Opened KPackageKit, cliked on settings, and "Edit software sources". On "Third-Party Software" tab I ckicked on "+ Add..." button and pasted "deb http://ppa.launchpad.net/kubuntu-ppa/backports/ubuntu jaunty main" without quotes. Then on "Software Updates" I clicked "Apply all available updates". SUCCESS!

Then I opened Konsole and typed "sudo apt-get update" SUCCESS!

OK so what do i have to do now to install KDE 4.3 RC 2?

sudo apt-get install KDE or sudo apt-get install kde 4.3 or sudo apt-get update kde??? help!