fyi, things like moderator privs and the such are serverside. you cannot edit any packets to give you access to this (any of you ever play on the WoW emu? same concept, the GM status is serverside, the server has a list of players, and their level is set there).
most likely, all usernames and passwords are managed by a SQL database, which would allow for the online user sign ups, and allow them to set the level of moderators. unless you want to do some actual hacking... then we wont be able to do this (unless of course K2 network, and the rest of the people who made warrock are incredibly stupid and uneducated, and were unable to forsee the concequences of having moderator privilages client side :S)