how can i add more writers?

There's a couple of different ways. When you're on your event's page, you'll find an "invite" box on the right hand side. There you'll find links to invite writers, commenters, and watchers.

You can also invite someone to be a writer by clicking the "invite" link on one of their comments.

Hope that helps. We have a couple videos at http://www.scribblelive.com/Instructi... if you want to see a quick run-through of how it works.

Thanks for the question!