XBMC and Antec Fusion on Ubuntu 12.04

On Ubuntu 12.04, most things actually works out of the box. So, start by installing xbmc:
sudo apt-get install xbmc
A lot of things work right from the start, but to be able to configure every detail, we need lirc:
sudo apt-get install lirc
Lirc is to be configured with linux input layer (devinput). A quick test with
irw
shows that almost every button is recognized on the remote. To configure XBMC, add Lircmap.xml to your ~/.xbmc/userdata directory and adapt the devinput section.
Fix the remote control by installing lcdproc and editing /etc/LCDd.conf to use imonlcd as the driver.