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For Ubuntu Karmic users
First edit /etc/apt/sources.list file
gksudo gedit /etc/apt/sources.list
add the following lines
deb http://ppa.launchpad.net/bisigi/ppa/ubuntu karmic main
deb-src http://ppa.launchpad.net/bisigi/ppa/ubuntu karmic main
Save and exit the file
add the GPG key using the following command
gpg
--keyserver hkp://keyserver.ubuntu.com:11371--recv-key 881574DE && gpg -a--export 881574DE | sudo apt-key add -
Or simply use the following command
sudo add-apt-repository ppa:bisigi
Update the source list using the following command
sudo aptitude update
Install all the themes using the following command
sudo aptitude install zgegblog-themes
or click on the following link
This will install the following themes
Showtime for Gnome

Balanzan

Infinity

Wild shine

Exotic

Tropical

Bamboo Zen

Ubuntu sunrise

Aqua Dreams

If you want to install above themes separately use the following commands
sudo aptitude install showtime-theme
sudo aptitude install balanzan-theme
sudo aptitude install infinity-theme
sudo aptitude install wild-shine-theme
sudo aptitude install exotic-theme
sudo aptitude install tropical-theme
sudo aptitude install bamboo-zen-theme
sudo aptitude install ubuntu-sunrise-theme
sudo aptitude install aquadreams-theme
Remove Themes
If you want to remove full package use the following command
sudo aptitude remove zgegblog-themes
If you want to remove each theme use the following syntax
sudo aptitude remove themename
Note :- themename is showtime-theme,balanzan-theme etc




You are probably referring to the Cairo-Dock. Warning you may have difficulties getting this to fly with the existing source list entry. Look for it on Launchpad.net - and use the PPA from there. There are some odd DNS issues with their standard package source, but the LP one still works fine.
i love thats themes