I have put a key in the NT4 registry which prevents the system booting. I need either to access the registry, or possibly I can fix it if I can move a certain file from one folder to another - the key defines a path which is incorrect.
Creating an NT boot-disk doesn't bypass the registry, and booting from a DOS boot-disk leaves me unable to see C: since DOS only understands FAT partitions and we have NTFS.
Is there some way I can see the C: drive to create folders and preferably edit the registry? The former is an easier starting point since to edit the registry would presumably need some editor, unless it's stored in human-readable form?

This is kinda urgent, any help much appreciated.
Thanks.