[Closed] Script Request> Explode+attach groups

Here is the request, for those who have some time for make following script, I guess it is not so hard:

1. Select 5-10-15…or whatever groups, be aware to place them to not overlap each other, maybe it is important, I do not know…
2. Explode every single selcted group
3. Attach objects into one poly from one specific group
4. Place the pivot into cener of object
   4a. Not to needed, but if Z axe could be placed at zero level, excellent!

Obviously, this kind of script should be awesome for archiviz users.

Thanks in advance!