Your boot.ini should read:
[boot loader]
timeout=30
default=C:\
[operating systems]
multi(0)disk(0)rdisk(1)partition(1)\WINNT="Microsoft Windows 2000 Professional" /fastdetect
C:\="Microsoft Windows"
(I'm presuming you're using Win2K Pro).
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If it still won't work, then use the recovery console. If the console won't run, you may have to reinstall it either from the CD or by adding it to the start-up folder. See
here. and
here.
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