I need a little help here. I know there is a way to disable mass storage devices on a machine by adjusting the registry key. The problem I have is that I have a bunch of dell x300s that I don't want my users to use external hardrives on but the laptop uses the USB to attach the DVD/CDR and floppy drives. Disableing mass storage devices in the registry also disables the floppy and DVD drive. Is there a way to "selectivly" choose which USB mass storage devices the OS can use?