I'm assuming the op used one of those fake or temp email addresses, so now he doesn't remember the email address that was used. is this account on any other system? on the vita, the email address and password are in the system.dreg in vd0/registry. the password is in plain text in the ascii/text field, so you can write that down, as is the email address. I think you only need fixreg for fixing the checksum if you were to make changes or something, which you won't be. the ps4 is a little different. oct0 , iirc, made a registry editor for that system. I think there are around 5 registry files on the ps4, but I've forgotten where they are. the registry editor can do at least 4, if not all 5, of the files, in case the psn information you need is on there.