I didnt "ruin" a controller... I simply remapped an extension cable. And with said modified extension cable I can now hook up my xbox controllers to my pc AND hook up my usb devices to my xbox.
I have downloaded and install Stempmania for the xbox and its GREAT (better IMHO than DDR Ultramix). BUT... there are a few issues Im having with the install.
I have modified an XBox controller extension to plug into a usb port on my pc but cant get the darn dance pad to work. I should note too that I run Linux.