You have a separat fuction for usertitles in your admin cp!
There u can add a Usertitel and the amount of post a user needs to get this title!
I have an other star hack cause I don?t need so much stars

but I think if your users get more stars if they post more then the hack works fine
If you need more assistance send me a pm with your icq number and I try to help you!
Greetings
StarBuG