>>I'm going to chicken out and go this route....
A good choice, since you have the option. Safest.
But be careful. When you get ready to install DOS you will have to boot from the DOS install floppy. At that time the C drive MUST be your non-NT drive, because DOS is going to install from the floppy onto the current C drive.
If the current C drive is the NT boot drive at that time, you will zap the NT boot sector if you install DOS on it. At that point you will be back to option A, namely, multiboot NT with DOS as "other". This is what you're trying to avoid. Paul (pae) avoided it with recabling, the safest yet. Note that recabling is a one-time deal, for the install only. Once installed, you can boot DOS from the bios.
Note: If by any chance you do zap the NT boot sector, you can recover by an NT install option. BUT you should be sure to have the three-floppy NT install-from-floppy set available to do so. You can actually make this set from DOS, provided you can get at the CDRom, but it's safest to make a set before you set out (CDRom access from DOS is Yet Another Story). In fact, you should get a set delivered with the NT CD, but I wouldn't count on it.
You can also run the recovery from DOS if you can get at the NT CD, now that I think about it, because the CD contains an NT install that will run from a DOS prompt (another reason to have a real dos prompt available).
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