A couple more hours this AM...
Located the Logitech mouse driver and unistalled it. No difference. Again, upon plug-in of the console, Vista reports an "unrecognized device," so it doesn't know it's a Pronto or a printer. Therefore, the driver install routines don't work or complain.

I manually located and installed throught the MS USB wizard a Philips composite USB device which is what the Pronto is and the driver installs but complains because it cannot validate the proper driver if it does not know what the device is.

I really can't believe Philips cannot support the "simple" install of a USB device like thousands of other manufacturers. Plug-n-play is supposed to do just that!