I'm a little new to dotnetnuke, so I might be over looking something.  How do I configure it to not require a display name when registering?

Ideally I would like them to not have to enter a username or password when registering...  Is this possible?  I know it sounds silly, but basically we have some white papers that we want to make available for download, but only if you fill out a little survey that contains firstname, lastname, company, title, telephone, email, and prefix.  I figured if we can make them users then we can use the newsletter feature and all entries will be stored in the db.

Thanks in advance.