Editor , undocking into two GROUPS

Hi, everyone!

I was wondering if there was a way to undock say 50% of the open .m files and group them together? As of now i have only been able to undock into single windows.

Example:

i open 10 files, they are then all tabbed together in the editor window. From here you can right click a file in the tab and press undock. Then it will pop out into a separate editor window. From here i would like to able to get another file from the original editor window, undock that too but instead of opening a third editor window i would like it to be placed in a tab toghether with the first file i undocked.

Is this possible?

Thx in advance!