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essentially you're outlining the SUBST command....
whereas:
SUBST [drive letter]:[path] would do an individual path to an individual drive letter... now, if only they allowed one to use this on .iso files ... like "mount -loop .... etc..."
Funny, I can mount ISO images out of the box on OS X and Linux...you'd think windows would pick up this feature...oh wait, aren't ISO files how people pirate windows and windows software? I see a motive for microsoft in this one. Anyway, just grab Daemon Tools. It's freeware, and will let you mount ISO images (among others) as disks, all with a shiny graphical interface that windows users collectively get all hot and bothered over