I got it installed on a Zyxel NSA325V2. I managed to get through the setup guide, it's scanning sources from XML / M3U. Every two-four minutes it just stops working and I have to run: sh /ffp/start/tvheadend.sh start to start it. I got to scan 9674 channels and I got to 168 in six hours or so because it keeps quitting. I got debugging checked off now and will post next time it happens
If you are setting up an IPTV Automatic network, on the screen where you enter the playlist there is a "Service ID" near the bottom. If you set that to "1" then it will not scan all the channels, it will just add them without going through all the scanning.