Download the pkges from berlios cairo repo, these:

Cairo-dock (http://prdownload.berlios.de/cairo-dock/cairo-dock_v1.6.3.1_i686.deb)

Plug-ins (http://prdownload.berlios.de/cairo-dock/cairo-dock-plug-ins_v1.6.3.1_i686.deb)

Themes (http://prdownload.berlios.de/cairo-dock/cairo-dock-themes-1.6.3.1.tar.bz2)

Copy/download them to ~/ or Home

Now lets install, run this in terminal

sudo dpkg -i cairo-dock_v1.6.3.1_i686.deb cairo-dock-plug-ins_v1.6.3.1_i686.deb

After that run this in terminal

tar xvjf cairo-dock-themes-1.6.3.1.tar.bz2

cd to pkg cairo-dock-themes-1.6.3.1

After that run: $./configure

Then run: $ make

Then: $ sudo make install

And finaly: $ make clean

Then run cairo-dock from menu.