Packet editing [Help]

Yah.. can some1 ddirect me to a link with a packet editor tut or anything about packet editing tht i can download?
im familiar with it because i used in old games.
Please and thank you :P

please dont be lazy and go search by urself

there is not anything about packet editing on here, since most people don't do it. Those who do, don't post tuts because it could seriously mess up the game if noobs had that information. just google it