I would like to know if i can plug it back on my xbox 360 after the modifications and use it normally. Through the normal connection or through the USB (I don't think via USB).
It would be awesome to have a receiver that works both for PC and xbox 360
Yes you can plug it back to x360, but only if you unplug it from PC. Do not plug it to PC & X360 on the same time, one device at the time. Don't plug USB cable you added to X360.