You may already know that in order to clone any campaign in your Dashboard, all you have to do is click the little sheep button, right underneath the campaign thumbnail. Then an exact copy of that campaign will be created.
But you can also use this very same button to clone that regular campaign into an Autoresponder email!
Pro tip: Make sure you have your Autoresponder created, first! That way, you'll be able to tell Email Marketing exactly where to put that cloned campaign.
When you're ready, just click the little sheep, and then select the Autoresponder option from the overlay page that pops up.
Choose the correct campaign from the list of all your Autoresponders, and then click on the Clone button. Email Marketing will take care of the rest for you. Go to Autoresponders under the Addons menu, to check out your new addition.