I'm using Kawaks, and I notice so many different version of the same game, and the both play/work the same. Example is one of the mslug.. i think it's mslug3, it has the normal version, and the "decrypted version". Or like I have some fighting games that say "set 1" and "set 2". What do all these mean, and if they are the same game, why have different types? Thanks. ( I did do a search, but couldn't find the "meaning" of what they meant. and the search gave me 11 pages or so....)