dicamarques
in the op there's missing 1 guide "Raspberry Pi 2 - PiPass"
It's not mentioned on the github page, but it's for Pi2 only for the moment
Currently, there is only a pre-made image for the RPi 2. I should be able to get my hands on a RPi Model B soon. The readme has instructions for manual installation that will work on RPi Model B and RPi Model B+. There isn't much tinkering to do, aside from installing some dependencies and setting permissions. I never thought about it during the time, but since PiPass is Python based, another user on this forum was able to install PiPass on his router and has everything working.
If anyone has trouble with manual installation, I can try to help on the main PiPass thread here in the tutorials section.