How to: freeRADIUS with PostgreSQL Backend!

I have setup a working freeRADIUS server & now want to add PostgreSQL as backend for storage of data. I have read the freeRADIUS documentation and researched the internet on this subject. What I am looking for is any kind of Step-by-Step document detailing sequential steps needed to setup a PostgreSQL back end for freeRADIUS. Has someone written such a document? Is there such a writeup available?