I want to reuse my avatar when sending individual messages to my students.

An article from 2011 http://blog.voki.com/2011/05/12/how-to-copy-a-voki/ shows a method of emailing a copy to myself and saving it. Is this still the best way to reuse the avatar I created when I want to just change the audio and send a new message to another student?

Related question one: If I send a message via email and then edit my Voki to add a recorded message for a second student and publish (save) and send it to my second student, will my first student still be able to hear her message or will she now hear student two's message?

Related question two: Do the presenter or classroom versions allow you to copy/reuse your avatar in an easier fashion than emailing a copy to yourself?

Thanks. This is a great product. I'm teaching part time and if I get more students, I might want to upgrade.