Make sure you are using the lastest version of Raspbian:
$ sudo apt-get update
$ sudo apt-get upgrade
Install pifacecad (for Python 3 and 2) with the following command:
$ sudo apt-get install python{,3}-pifacecad
Test by running the sysinfo.py program:
$ python3 /usr/share/doc/python3-pifacecad/examples/sysinfo.py
You will need to configure the IR receiver yourself. More examples can be found in /usr/share/doc/python3-pifacecad/examples/ (which may need unzipping using gunzip).
You can run sysinfo as a service using:
$ sudo service pifacecadsysinfo start
You can stop the service with:
$ sudo service pifacecadsysinfo stop
You can enable the service to run at boot (handy for headless Raspberry Pi’s):
$ sudo update-rc.d pifacecadsysinfo defaults