Why can't you boot into W2k - do you get the same error message....?
Or is it that NTLDR is missing or corrupt or whatever....?

Can you not get a working copy of nvcpl.dll and using a Dos boot disk
navigate to the system32 directory and put it in there over writing the
other one...? Might or might not work - can't understand though why both
OS's are not bootable - either as normal or in Safe mode.

There are plenty of returns when you Google.... repair dual boot XP

Might be an idea to look there.

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Regards

Morgan