I have a slightly different scenario and would need help.

A mate's pc crashed (it was on Windows 7), the file system (NTFS) is half corrupt, so the HDD itself won't boot or be recognised by other PC. I extracted the HDD and connected to a working PC with a USB-SATA cable.
With a data recovery tool I reconstructed the file system and tried to recover the critical wallet.dat file. I can get the entire dir out but wallet.dat seem corrupt (the file opened in an HEX file shows all zeros, seem totally empty).
How would I run this tool to scan the crashed HDD in search of these key traces?