On the G2M, there's nothing to customise. You can of course tweak your software (DAW, sampler, etc) but there are so many options there, it would be difficult to do a video that would cover everyone.
The i2M musicport, however, can be customised, and indeed it would be nice to do some more demonstration videos to show what you can do with that. For now, we have to focus on some other things (the new Wahoo product for example) which also needs some videos.
Regarding Buznut, yes this helps avoids ghost notes on the open strings which aren't being played. Often you do this by palm muting the unplayed strings, but some people find that difficult. Buznut lets you quickly damp open strings when you want to and slide it to undamp the strings to play normally when required.