From the doc: 'The 'Virtual Drives Manager' is the freeware tool which lets you to define, redefine and delete the virtual drives in your file system. The Virtual Drives (also known as MS-DOS device names) is the symbolic links, in the object name space in 32-bit versions of Windows, which points to the directories of your existing drives (hard, floppy, CD and so on). The code that converts an MS-DOS path into a corresponding path in 32-bit versions of Windows uses these symbolic links to map the virtual devices and drive letters. This program can manage the virtual drives on either Win9x and NT-family machines.'
virtualdrives.exe