[negge]

You don't need to copy any files, installing the ZIP is enough.

Thanks -- but is it possible to install it globally on the system (so each user doesn't need to install from a zip file, and if an update comes out everyone gets it)?

Yes, in that case you move the installed addon from .kodi/addons to /usr/lib/kodi/system/addons (or something like that, I don't remember the exact path).

@ullix: pvr.tvh will replace pvr.hts in time for the next release, if both work for you then you don't need to bother. pvr.tvh has some features that the official version doesn't have, plus it works way better over WLAN or WAN.