This is what the author said:

i saw ppl were asking how to get the rumble and both triggers working on the 360 controllers, so today i downloaded the DXSDK, learned XInput, and made this simple input plugin.

holy crap XInput is SO easy to program, I cant believe that MS could make something work so well, if only the controllers were bluetooth and i didnt have to have this stupid $30 dongle plugged in. lol

right now there is no configuration, next version will have that, but i think i got the controls set pretty good for now.

A = A and Y
B = B and X
C Buttons = Right Analog
Z Trigger = LT
R Trigger = RT
L Trigger = LB

Supports 4 Xbox 360 Controllers Wired or Wireless with Default Microsoft Drivers
Rumble and Both Triggers work separately

Download here and give feedback via comments