How can I use a hex editor to modify a B/W2 save (specifically Join Avenue)?

[GentleMorningStar]

I found a great post by Kaphotics in which they explain how to use AR codes or save editing to edit data from Join Avenue.

However, I have no idea what program needs to be used to access this data. I spoke with a former developer who said saves are encrypted and divided into blocks. He said if I wanted to use a hex editor I would need to decrypt the save, modify it, reencrypt it and correct the checksums.

I have very limited Python knowledge and have never used a hex editor, so I really have no idea what tools I need to edit the save in this way.

Can you give me a summary of what I need and maybe some resources to learn how to do it?

[Delta Blast Burn]

hex editor

Youtube tutorial

[GentleMorningStar]

On 12/16/2020 at 10:16 PM, Delta Blast Burn said:

hex editor

Youtube tutorial

Thanks a lot.