All I had to do was unplug my POTS service out in my junction box (it had a regular RJ-11 plug) and then plug my PAP2 into a phone jack. Voila... all my phones work just like they did with POTS. Also, make sure to label your junction box so nobody accidentally reconnects it and toasts your phones and VoIP device.
One thing I did get out of the article that I hadn't done... protect your VoIP device from lightning. I have a spot on my surge supressor for phone connection, but I never used it. Seems like a safe easy thing to do.