Install required files
sudo apt-get git-core install autoconf build-essential linux-headers-`uname -r`
Create symlink for the headers
ln -s /usr/src/linux-headers-`uname -r` /lib/modules/`uname -r`/build
Get the source
git clone git://git.wilsonet.com/crystalhd.git cd crystalhd/driver/linux/
Compile driver
autoconf ./configure make sudo make install sudo modprobe crystalhd
Compile lib
cd ../../linux_lib/libcrystalhd/ make sudo make install
Done. Fire up XBMC!