Recovering an NTFS partition

I've got a big problem...

My computer hanged up while copying some files to the NTFS partition under Win98 (using NTFSforWin98).

Next time I wanted to start Win2k I've got BSOD (INVALID_BOOT_DEVICE). After checking the disk, Win2k came up but the NTFS partition became unreadable. The volume lable is corrupted, too.
ChkDsk says:
Unable to determine volume version and state. CHKDSK aborted.
PartitionMagic 8:
bad file record structure.

I need help with restoring the data.