To all those thinking of using a modded controller to play modern warfare 2 think again. Infinity ward has employed the use of new features that actually measures the delay between shots. If your delay is always say 0.01 seconds between shots then you will:
Be kicked from the game
Banned from playing online for a certain period of time
another possibilty is that infinity ward will mit the amount of shots fired within a time period. However this could piss some true trigger happy gamers who have quick fingers, so its doubtful this will happen.
So next time you think of using a modded controller use your brain.