Flash Doc to MC?

I made a mistake and started a new project by creating a button animation.
My intent was to turn this into a movie clip and then use instances of it in the document.

Trouble is, I should have started it as a movie clip but didn’t. Now I’ve got this cool animation (5 layers / 20 frames) that I can’t get as a unit into a movie clip :worried: . When I select, copy and paste into a new mc, all it does is paste the whole selection into a single frame of the new mc. Not what I’m after.

Any ideas here?