I have no idea if this stuff works or for what it´s good for, I use Snort for packet capturing, but that´s possibly not the kind of program you´re looking for...
like bad_brain said...gamehacking.com has some good tools you can use...i personally would use WPE Pro...i've used it in the past for a lot of packet filtering...they've also got a listing of some pretty good tutorials to figure out how to determine the packets you'll need...and how to use the program
heads up..if your anti-virus acts up...it's just "the man" trying to stop you from being "naughty"...with "hack tools"...