~thinks about this~
Blizz, is there a way to change the file extension used for the save files, to something unique, and upon loading the game, have the main read all of the files name *.randomextension and change them all to *.properextension? Then, you could create a reg entry that changes the icon for that random data "type". Obviously, you would need to change that extension back to the .randomextension after the files where saved, right before exiting the game, but for some reason, I feel like this is something that a .dll could do. I'm not familiar enough to really know for certain if that's possible, but I think F0 and his newfound .dll abilities might be a good resource here?