Install (K)ubuntu Breezy Step 2: Upgrade to Kubuntu

Changing from Ubuntu to Kubuntu is quite easy with a fast internet connection.

First, you have to change your sources.list from apt-get. (Apt-get is very powerful: you can download, install / uninstall programms and even update your system).

Open a terminal (System Panel --> System --> Terminal Program (Konsole)).And type:

sudo cp /etc/apt/sources.list /etc/apt/sources.list_backup
sudo gedit /etc/apt/sources.list &

(All the commands you have to type into a terminal will be in the format above!)
"sudo" will perform the command with superuser rights. (It will ask for your user password).
Change your sources.list, after it should look like that:

deb-src http://archive.ubuntu.com/ubuntu breezy main restricted
## Major bug fix updates produced after the final release of the
## distribution.
deb http://archive.ubuntu.com/ubuntu breezy-updates main restricted
deb-src http://archive.ubuntu.com/ubuntu breezy-updates main restricted

## Uncomment the following two lines to add software from the 'universe'
## repository.
## N.B. software from this repository is ENTIRELY UNSUPPORTED by the Ubuntu
## team, and may not be under a free licence. Please satisfy yourself as to
## your rights to use the software. Also, please note that software in
## universe WILL NOT receive any review or updates from the Ubuntu security
## team.
deb-src http://archive.ubuntu.com/ubuntu breezy universe

## Uncomment the following two lines to add software from the 'backports'
## repository.
## N.B. software from this repository may not have been tested as
## extensively as that contained in the main release, although it includes
## newer versions of some applications which may provide useful features.
## Also, please note that software in backports WILL NOT receive any review
## or updates from the Ubuntu security team.
## deb http://archive.ubuntu.com/ubuntu breezy-backports main restricted universe multiverse
## deb-src http://archive.ubuntu.com/ubuntu breezy-backports main restricted universe multiverse

deb http://security.ubuntu.com/ubuntu breezy-security main restricted
deb-src http://security.ubuntu.com/ubuntu breezy-security main restricted

deb http://security.ubuntu.com/ubuntu breezy-security universe
deb-src http://security.ubuntu.com/ubuntu breezy-security universe

deb http://archive.ubuntu.com/ubuntu/ breezy universe main restricted multiverse

Save the file and close it.

Now, we first upgrade the system. Type into the terminal (one after the other):

sudo apt-get update
sudo apt-get upgrade

Now your system is ready for Kubuntu. Type:

sudo apt-get install kubuntu-desktop

This will install the kubuntu-desktop. The download may take a little time. It will ask you which login-manager you want to use: gdm or kdm.
If you prefer KDE like I do, choose kdm, if you like gnome, gdm.

After the installation is complete, type:

sudo apt-get install kde

When apt-get is done, close everything and logout (do not shutdown nor reboot!). Click on "session" and choose KDE as default.

Now you can reboot and you'll be on kubuntu now.