you say:
"and then it appears to get 'stuck' and Dreamweaver freezes with a 'file activity...' bar that doesn't seem to be doing anything.
how long are you giving it to complete, depending on the size of your users table and the number of columns that you have selected to include in the registration, it may take a couple of minutes to move on.
before running the wizard, try closing all panels that may be open like the files panel, and server behaviors panel.