The AFTV is not a MAG, it's just a customized Android device. I'd forget about IPTV Stalker for now, and focus on configuring the PVR Stalker (aka Stalker Client, in the PVR Clients list). You can use the PVR Stalker NFPS as well, which is available in the epg.ninja site. You do need the serial number and device id for the built in PVR Stalker, but you don't for the NFPS version.
I prefer the built in Stalker myself... I like knowing what is going into the server.
I prefer the built in Stalker myself... I like knowing what is going into the server.