My iMac time is split 50/50 between Windows XP and OSX. What I'm looking to do is block my XP from recognising my iPod - I only want it to be charged. But on OSX I want the iPod to synchronise automatically. Is that possible? I've tried disabling the iPod services but I still use iTunes for music, so once I boot that up it connects to the iPod. Is there a way to disable a specific USB data connection in Windows?