At a Russian forum I met a quote:
Differences in Windows 2000 NTFS 3.0, Windows XP’s NTFS 3.1 and Vista’s NTFS
There are a number of small but important changes, one of which is the ability to ‘Shrink’ or ‘Expand’ partitions which NTFS version 3.0 partitions do not allow.
Unfortunately, the source does not open.

On this and other things I read, I suggest try the following.
Restore the first partition of Disk0 from the existing backup, without changing the original size (before that remove the one that's there now). Would check. If the same does not boot, then
Would make RAW-backup this first part (Home - Settings - Backup - Copy and backup options - check 'Partition Raw processing'). Restored it to a new disk. Check.

But first of all I would make Disk1 "self-sufficient", so that the PC could be started from it without requiring an additional Disk0. To do this, can copy the files ntldr, NTDETECT.COM and boot.ini from "C:" to "H:" then Paragon "Update MBR".