Well, seeing that you have 500GB HDD (same as me). You want to install games but keep a 'little' space for their setups, correct? Fullrips are compressed 'setups', but the games are still bigger but a little smaller than original ones because they rip out all languages except English, meaning no useless dialogs, sounds, videos in other languages. But the game, after extraction would still be greater than 3GB. Only the setups are compressed, not the game itself.