I recently started collecting old systems and found for the best gameplay experience its best to use a Game Genie and just punch in inf lives, continues, etc... especially when you're with friends. Beating game after game (classics) in one sitting is too much fun. The N64 now uses a Gameshark and they are marked as version 2.1, 3.3 and so on. I'm guessing the latest version is the best but what's the difference? Allows for more codes, works with more games? PS- Anything I should know about getting a Gameshark for other systems like what version # works with a certain Playstation model # or should I just shoot for the latest version for all the systems? Thanks..