C++ and Mysql - World of Warcraft Free source server - WoW GM

Hi! We are looking for somebody to create npc/objects/mob/boss behaviors and fix errors for a MMO game. This game is an open source game, its a mirror of the original game: WoW - World of Warcraft. The person we looking for need to know C++ and MySQL so he can script our world. Know the game itself or have played is not a requirement, but helps ALOT if know and/or have played it. What we need is fix errors of this game, for example, a boss that was supposed to cast a spell on players and is not doing it. As for payment, I would like to discuss, cause I never hired someone to do this kind of job, so I have no idea how we should do it, I mean, per hour, per month, per bug fixed or feature added, so please, send me a message so I can give you more details and you can tell me about the price. Have in mind this job is easy to done once you can work at any time you wish and all the things you have to do will be always small scripts, so you can get lots of things fixed in matter of minutes. Gonna wait your replies, thanks alot! OBS: I am just gonna hire someone that can prove he can do what I need, so will be some small tests before we go ahead.