@Joe & Scott: Thank you for your advice. Anyway, I tried to send you a private message and I seen that Kunena doesn't have this feature. I cannot use a cms that doesn't a feature important like that.
Anyway, this is what i wanted to ask you: Can I try to replicate your corvus theme on another forum cms? Of course I'll use it only on my own forum... I won't sell it or something like that...