how to use node review module effectively for evaluation?

Hi,

My requirement is to get the submissions from the users, title, email id and the Abstract (250) words. The submitted abstracts will be reviewed by the experts later, giving an abstract a rating/grading with some comment.

For this I used CCK and created a content type called 'Paper'.
Then I installed and configured nodereview module:
http://drupal.org/project/nodereview

The problem is I could not find any option in Access Control (Permissions) so that a group of users (role) can add reviews. Only the first user (super user) can do so.

Please suggest me how to use it properly?

Please also suggest me if there is any better module available for my requirement?

Thanks and Regards