can I remove the login details on the forums pages

I am creating classes and using the members plugin to allow class participants access to two specific pages - one for class content and one for the forum pages.

I don't want them to have to 'sign in' with their email, etc, each time they post. Can I remove this function from the forum?

ps. I've just joined WPMU and trying to find a tutorial, manual, etc on the forums plugin so if anyone can point me in the right direction I'd appreciate it.