renaming a disk/partition on Mac isnt hard
How to Rename a Disk Partition in OSX | Unix Tutorial[
^] - I dont see what this has to do with the Virtual Machine - Parallels Virtual Machines are in files with an extension of '.pvm'
so Instead of being (for example)
Z:/some-path/Windows7.pvm
you'll have
D:/some-path/Windows7.pvm
did I miss something ?