anon2230 this is a five year old forum, why not just start your own? this one's dead and [was] buried.
look up a curse on here, or write your own like SilverVixen said. first sit and meditate, try to clear your mind of all emotions which can cloud your judgement, and figure out if the person should be cursed. if yes, how bad of a curse, and are you prepared to face the negative effects should it back fire, as well as the three fold law returning upon you? to me, there is a rare occasion when a curse is fine. this, however, is cast as a means of karmic retribution against someone which karma seems to of passed over. 95% of the time though, we're just upset and want revenge.
like with any spell, you need to charge and focus. with hexes and curses, you need to conjure up all your anger and hatred towards the person to make it truly effective. just think before you do and be careful what you wish for because we have enough bad things in the world without revenge crazed individuals.