Aye, as someone who grew up on Castle of the Winds, I was used to save games even in RLs when I started playing, but it was actually great to discover they're uncommon, 'cause now I'm a much better player than I was.
If people want to cheat, let them cheat. It's their loss and they're less likely to learn to play better. I trust people here are as good as they claim, at least because it gives me high standards to try and beat. Anyway, like people here said, anything in a .txt file can be changed, and probably most other files too, if you're really up to it. Yeah, we have the score as a form of checksum parameter in some cases, but knowing to check it means someone else can know how to change it correctly (although in major cases we can ask Kornel to check it without giving away the details ;) ).
Anything else will be much easier to get around, so I'd rather not bother.