I imagine that there's probably a failsafe on the ecu or scanner to prevent you from tampering with it esp. in monitor (or whatever they call it) mode.
As for it's interface with RR you may need to code or have something coded for it. If it's plug n' play usb it shouldn't have any issue talking to XP. Weather or not you can get real time data i think depends more on the sender hardware and the receiver software than the transmission media (cable).
Read the support documentation.