Hi, I have spent some time recently, to develop add-on for working with group instances in easy way. It allows you to edit any group instance on scene, without need to search for source of dupli-group objects. This was not so easy task, but now we can use group-instances is similar way, the components work in sketchup. Addon allows you to nest groups inside of each other, so you can make group of sub-groups, of sub-groups…
Here is video demo of how addon works:
Link to the addon:
I hope you like it.
Q: Will blend file made with GroupPro work, on PC which does not have it installed (eg. on render farm)?
A: All the blend files made with GroupPro, will work on PC, that do not have GroupPro installed. So you can render it on render farm no problem. But other people wont be able to edit groups.
Q: Does GroupPro support editing external linked groups?
A: Yes since 2.1 release (finally 4 years after this question was originally asked!)
Q: How do I make one group unique (eg. one window unique)?
A: See new GroupPro version 1.02 - introduced ‘Make unique’ button.