Ok, I’ve got a really cool video for you today on how to mod your Xbox 360 controller–this covers a completely new way to do the rapid fire mod by using only a momentary switch and a wire to hook it up. You just wire in the switch between the middle pin on the trigger and the ground on the controller LED. The only warning I’ll give you is that since it’s connected to the LED, you can only use this mod through the specific port that you’re using the controller on.
Although this particular mod can not be detected by Xbox Live, it does create what could be considered an unfair advantage in multiplayer gaming, therefore it could potentially result in you having your account banned. Warm up your soldering iron and have a look at this:
I’ve also got another video here of someone who has done this mod and shows you what they did, good if you need another perspective: