What would be the minimum data required to decrypt a private key? Would it be ckey! and mkey, what about salt, is that part of the mkey? All depends on having the correct passphrase of course. My corrupt wallets have been either fragmented with groups of ckeys that have been separated from the mkey, or other data in the wallet has been corrupted causing the wallet to be unusable with normal methods. I'm pretty sure that the hex values of the mkey and ckeys can be found quite easily by using Winhex or similar. If possible, it would be fantastic to have a tool for manually inputting the keys and passphrase that doesn't get tied up with other corrupt data in the wallet.dat.