Yeah, it bothers me that Windows doesn't have the equivalent of "mount" or "assign" commands. It does have the "Subst" command, but it only works occasionally, and can really raise hell if something goes wrong (I had a Win2K system stop booting, even in safe mode, due to a script error with the Subst command. I ended up having to re-install the machine).
Instead of "Subst command", I use WinXP-Pro-SP1's "share folder" and "Map Network Drive" to create pseudo drives** .
**PS; A Firewall and adequate security regime must be in place.
Microsoft is leaning on *nix style “Dynamic Volumes” concepts i.e. a single logical drive that spans multiple physical hardware drives.
I ended up having to re-install the machine).
It’s not recommended to stray from Window’s standard directory structure since critical files are reference in absolute terms e.g. %SystemRoot%\ and ‘etc’.