I've got the same box running on Vix 3.2.037. I'm not sure if MGcamd 1.0 works but a couple of months ago I was running 1.38 (simply downloaded from the plugins) & it was all fine.
I was curious about OpenATV so flashed that to the box & ran 1.38 but I found my line would glitch a fair bit so I went back to OpenViX. Annoyingly, in this time, Vix had stopped the ability to download plugins via the box for the 3.2.037 image (an outdated image but the latest one compatible with the Venton), so I tried to ftp the 1.38 ipk to the box, but I didn't have any luck with that. Maybe the ipk wasn't compatible or something? Anyway, I found a 1.35 ipk, ftp'd that & it works perfectly.
On the Openvix website it says that 3.2.037 is the latest image for the Venton Unibox HD Eco+ but has anyone tried flashing 4.2 on it? I'm apprehensive to try it incase it bricks my box.