If it is of interest, I also have an experimental USB device in a small case (sent to me by a friend in Switzerland who developed it) that allows a Beo4 or Beolink 1000 to control a PC directly, giving mouse movement/clicks and the ability to control iTunes, switch between open tabs, etc. This plugs into the PC via a USB port, so there is no need to modify the Beo4.
If you have a MAC with an IR port (or not), there's an app called "