>>> For 2.0 betas I'll figure out a better solution - I think maybe a separate centralized \plug-ins folder (probably in the same location as the moi.ini file) would work well so that extras can be installed in one place and still used by new beta releases without any extra copying around, just like the moi.ini file.

That would be a good solution I think. But maybe some of the most useful or "popular" commands should become an integral part of MoI interface (accessible from their own Icon in the main window). I tend to forget that some of them exist (like "ShrinkTrimmedSrf") if they are just accessible through shortcuts... ;-)))