There is a ton of data I'd rather not reinstall.
You don't need to. If you have W2k bootable CD, or if not you can make 4 of W2k setup disks by executing the file <b>Makeboot.exe</b> that resides in W2k CD's directory <b>Bootdisk</b>, you can recover its Bootloader.
After booting by CD (or floppy disks), you should reach W2k Setup screen. Press <b>R</b> to repair W2k Bootloader.
It will show you 2 choices to fix. One is using Recover console that I prefer to use (press C) and the other is Emergency Repair process (press R).
With Console, you must have Administrator's password. Type <b>fixboot</b> at Prompt to replace the boot sector, and then type <b>exit</b> to restart your computer.
With Emergency Repair, press <b>M</b> (manual repair), then choose <b>Inspect Boot sector</b>. It will copy your current boot sector to <b>Bootsec.dos</b> and replace it with the W2k Boot sector. This process requires you overwrite your old W2k boot sector with the MS-DOS/W9x boot sector that you need to boot from an MS-DOS bootdisk first, then at the Prompt, type <b>sys c:</b>
Good or Bad have no meaning at all, depends on what your point of view is.