your not meant to tell him you have to let him figure it out on his own. let him do the simple job of de-redshirting the save file and then opening it up to find the ip. its pretty simple but let him do it!
well it looks a bit like its done in pairs. so mabey is a monalphabetic substitution with double numbers and then padded a bit?? but thats a bit too easy so it would then mabey polyalphabetic in which case is indecypherable unless you happen to have a key?
not all ppl are willing to learn assembly just so they can hack this game, besides the trainer wont work for me but i suppose of you found the value in the game that let you change itr to granted it would be handy!