Could someone please either give me a workable definition of what it means to train or crack a game on the Commodore 64 or point me to a webpage that breaks it down? I've run into more than a few roms that Remember has cracked and trained so I know that adding cheats and hi scores is part of it, but I believe there is more to it like fixing bugs in the original game and optimizing the game's loading time or something like that.

Thanks for the help!