Complicated mc situation

I have this file that I found on the web and modified. It’s a bunch of letters shuffling and finally settling on a word I type in the code. The whole thing is a file with actions on the main timeline which duplicates one movie, and movie clips nested inside one mc. The file works fine all by itself. However, I need to use this thing as a movie clip in another file. When I make a new mc symbol, transfer all the code to the timeline of the mc, the duplicateMovieClip does not work. All it does is to play the first mc that’s placed.

I have included the fla for the original thing. Can someone tell me how to make the shuffling letter thing in this file one movieclip so I can use it in other files?