How to Efficiently Add a Long Memberlist

I'm running Web Wiz 8.03 and need an efficient way to add a long list of users and passwords.  I have at least 100.  I would hate to have to enter them one by one.

My server uses the Access database.  I'm able to open and view tblAuthor but I can see that Web Wiz generates some encrypted codes for username and password, so if I import a list that doesn't contain those, what happens?  Or is there another way?