Referring to many things at once

Just learning actionscript. (I’m a better programmer than visual artist)
I have a question in 2 parts.
Is it possible to either

[list]
[*]refer to all m.c.s at once
[/list] or

[list]
[*]dynamically (additively) group m.c.s
[/list] essentially, I am trying to replicate radiate accretive growth in Flash.

however, I need to add objects dynamically and be able to check the bounds of all objects.

ANy help will be appreciated.