Openvix don't do an official image for the zgemma range of receivers.
It's most likely a ported version of the max digital xp1000 image.
To get full support for plugins, try a different image (atv do one which is very similar to vix, go to image/firmware tab at top of page, select atv and select airdigital and pick your model)
Remember to backup your configs before flashing a new image.
I was using this openvix image with a few months with no issues. The openvix image I used was the one on the official zgemma site http://www.zgemma.tv/. I had previously tried openatv and the only issue I had with it was that I could not get crossEPG on it which was the only epg plugin that had epg data for Irish channels.
