karma mod?
 

i'm a member in a vbulletin board that has the word "karma" next to the reply button, and what you do is press it and it shows "i approve" or "i disapprove" and it shows a comment field right below. when you go to the user cp, you can see the reputation comments. how can i activate such a feature? is there a specific mod for this or is there a simpler way? thank you

btw, i posted this in the general board as well but nobody replied, the reason i'm posting it here is because it might be the more appropriate section.