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Technically related question: Insert bytes into middle of a file (in windows filesystem) without reading entire file (using File Allocation Table)? (Or closer, but not that informative). The extract is - theoretically possible, but so low level and hacky that easy to mess up with something, rendering the whole system inoperable. If this doesn't stop you, then you may try contacting Joakim Schicht, as he has made a bunch of NTFS tools incl. PowerMft for low level modifications and maybe he will give you some tips about how to proceed (or give it up and switch to traditional ways/workarounds).