Katie you have been told on another thread by JuanitoG to stop posting on dead threads, you don't need to post something as it has been out for over a year, just read over it next time if no-one has posted something under 5 days.
This was very informative, and I think that it expands beyond Creative in ManaCube. The blue and red text kinda hurt my eyes, but this was definitely helpful, thanks
Yes, it is possible to copy and paste with worldedit on creative. If you don't have advanced worldedit (from /shop) you won't be able to use //paste, but there is an alternative for that -> //place.