I have the latest Windows XP updates and the Razr needs some driver for RNDIS to use USB tethering but it doesn't install it automatically. I followed the Razr's Help instructions and tried installing tetherxp.inf which didn't work. I installed Motorola's USB device drivers but that didn't work either. I then tried to install MotoCast from the phone but it needed to download Java... nice Catch 22. How on God's green earth do I get the Razr to USB tether to Windows XP?