I have a 2 page Google Doc that I wrote while installing Mateix (because I wanted to be able to recover from a complete system loss, and knew I'd forget what I did). Half of the doc is my HAProxy notes.
Are you still having issues? I could try cleaning up my notes for a wider audience (note: my professional background includes technical writing and corporate technical training, so I'd be super anal about, and it would take a few hours at least).
Is this meant to be single-user, or a larger host?