Hi Lynda,
What you can do is click on "Followups", "Saved Sets", then "New". This will create a set of followups independent of your lists' followups. When you're done creating your series, browse to the list-you-want-to-apply-them-to's followups page and at the bottom right choose the set (you named and saved) and click "Load". This will replace (delete!) all existing followups on the list and replace them with the new ones.
There's also a new option on the List Settings page that may be of use. It loads a saved set of followups based on the percentage of users at the end of sequence.
When 95% of users are at end of sequence reset users and load saved set
For these features you'll need to be on a more recent version of ListMail, if not the latest.
Please let me know if I can be of further assistance or if you have something else in mind.
Regards