Thanks for the plugin, it works great!

I have minor suggestion, for your own benefit:

The Xbox 360 Controllers have two rumble motors, and they don't really do the same thing. One is a low frequency motor (left, i.e. heavy eccentric weight), one is a high frequency motor (right, i.e. light eccentric weight).

I'm not sure what you're doing with them at the moment as you removed the source, but you may wish to mess around with that until you find the perfect replication of the rumble pack. (Or just provide two sliders, but where'd be the style in that.)

the official rumble pack only has a large vibration motor, Constant or Ramp force type rumble reproduce the n64 rumble pack fairly well

VBA-M | NGOHQ | Post Impact Productions | TNHW | XBCD 0.2.7

Doable, but Squall said the main points well.