Agreed (to point)

All that logical ordering of stuff can be done with normal drive hierarchy... without ever having to trick a HDD into thinking it's more than one.
Critical data (including a pristine O/S installation-image) can be archived to CD's.
If, for some reason (dual boot is the only real reason that comes to mind) you need more than one HDD designation... again, they're so darn cheap and reliable, it's best to just get another. IMHO