thanks for clarifying this, unfortunately it doesn't help...
Once you've assigned your usb devices to NTFS junctions, they all appear identical in the remove usb storage device popup, ie for each device assigned a junction, you will see the line 'safely remove usb mass storage device'. There is no reference to device names or drive letters (cos there aren't any!!).
If you right click on the tray icon and select safely remove hardware, you get a more detailed dialog box, with the option to drill down (in a tree view) on each device. Using this method you can id which devices are which but at the expense of convenience (and when it's all said and done, that's what these things are supposed to be about)