OK... Does GBPVR talk to the USB-UIRT via a specific name, or does it just send commands to any USB-UIRT in the system? The reason I ask is that the USB-UIRT has a utility that will change it's name to allow for multiple units. I have heard that $ageTV takes advantage of this ability to talk to multiple USB-UIRTs.
The app just calls the USB-UIRT functions like "UUIRTOpen()" etc, which dont take any paramaters to specify a device number. I can only guess the manufacturer has later added alternative APIs for opening additional devices. I dont have multiple USB-UIRT devices though, so its not something I can add support for.