What are you trying to achieve?
The writable volume is specially mounted and merged into the OS. You can view it under c:\snapvolumetemp\MountPoints\GUI\svroot
You can mount it to a desktop w/o the client and browse to the hidden svroot folder as well.
I just was wondering if there was a way to view all the writable volumes in a explorer window like how we can view all the home directories for users. Guess it doesn't work like that!