Yes I understand. But the option to have it react differently. ie; If they were actually being scaled as a single object but all at the same time. So put a few boxes near each other, then scale them and they would grow "Through" each other. A different kind of scale.
Same diff with all the others was what I was refering to. I guess it's a bit different than what was being discussed. I had already misunderstood Nick's question! :O
At first I thought you meant that a group that is mirrored should automatically form a new group. Like mirror group 'Leg' and you get a new group 'Leg Mirror' or something like that.
But now i think you mean something like Components in Sketchup? Open a component, transform what's inside and all the copies of this components transform the same way?