[Mailman-Users] subscribing subscribers to topics

Is there a way, other than using the subscriber user page to subsribe subscribers to specific topics?. I have a list of about 1000 subscribers that I would like to break out into 5 topics. I don't want to rely on the subscribers to have to do this. So, any ideas on how to do this in batch via one of the provided MM utilities or other methods?

-- Christopher Adams