Download Ubuntu 11.10 Server

Install it, if you are unsure about something, use the default

sudo apt-get update
sudo apt-get upgrade
sudo reboot

sudo add-apt-repository ppa:elementary-os/daily
sudo add-apt-repository ppa:midori/midori-dev
sudo add-apt-repository ppa:nemequ/sqlheavy
sudo add-apt-repository ppa:marlin-devs/marlin-daily
sudo add-apt-repository ppa:elementary-os/testing
sudo add-apt-repository ppa:ricotz/docky

sudo apt-get update
sudo apt-get upgrade
sudo apt-get install elementary-desktop midori marlin plank
sudo reboot