When building an alternate version of a dungeon, what is the easiest way to duplicate the existing architecture and layout? I'm assuming I can do like I did in Oblivion and just copy the entire cell, remove unneeded clutter, change duplicate references, etc. - yet Skyrim level-building seems a bit more complex than Oblivion. Are there any new gotchas to watch out for when duplicating a cell? Or does the Creation Kit introduce a better way to do it now?

Right click on cell in cell window.
'Duplicate cell'
Done.