There are a couple of ways. You can click on Rate this user or xx points link next to the username in each message which will retrieve the page listing the feedbacks and ratings. On that page there is a link called Rate this user. When clicked, a remote window will be launched which will contain a form to rate that user.
Another method is to click on Ratings which will bring you to a page listing the index of users participating in user rating. The users are arranged alphabetically. By clicking on a letter, you can access a list of usernames beginning with that letter. Clicking on a username on the page will retrieve a list of feed backs and ratings that user has received. You can click on Rate this user link to launch the remote window containing the rating form.

1. What is a conference?
2. What is a forum?
3. What is a thread/topic?
4. Why are there so many different types of forums?
5. How do I get access to restricted and private forums?
6. When I post a message in one forum, it posts ok. But in another forum, it won't post. Why?

1. Do I have to register?
2. Why should I register?
3. How do I register?
4. The registration process tells me that I have an invalid email address. What's up with that?

1. What does each menu icon allow me to do?
2. Why do some file icons display flame?
3. Why do some forum folder icons display a lock?
4. Why do some topic icons display a lock?
5. Why do some topics have [view all] next to the subject?
6. What are all those icons immediately to the right of the username?
7. What are all those icons to the upper right corner of each message below the date and time?

1. How do I navigate?
2. How do I start a new topic?
3. How do I start a new poll?
4. How do I reply to an existing message?
5. How do I keep track of new messages?
6. How do I change my account information?
7. How do I change my password?
8. How do I edit my profile?
9. How do I edit my forum preference?
10. How do I subscribe to forums?
11. How do I manage subscription to topics?
12. How do I hide my profile or disable email functions?
13. How do I use an avatar image in my messages?
14. How do I use signatures in my messages?
15. How do I use HTML tags in my messages?
16. How do I post images?
17. How do I use HTML links?

1. What is a subscription?
2. What is an inbox?
3. What is a bookmark?
4. What is a buddy list?
5. What is a scratch pad?
6. What is topic rating system?
7. How do I rate topics?
8. What is user rating system?
9. How do I participate? Do I have to participate?
10. How do I rate other users?