Please realize that you are likely missing data. And always, for everyone reading, stop using the real hard drive, work from images, and give yourself a chance to properly preserve all data.
You need to use a backup of the hdd as you can not run the hard drive through a hex editor. Eaton is working on a tool to search for missing files for FATXplorer. Until them this is good at getting more games off the HDD that FATXplorer and party buffalo skip.
There are disc editors that will let you "hex edit a drive". But as stated, all work should be done from an image not the disc itself.