I tested the fixed version (I still don't know what has been fixed. It also wasn't stated in the topic) and the Rock Man X3 Rock version using the images and my PS3 Rebug (Cobra). The fixed version froze right at the "Now Loading" screen, whereas the rock version was played decently. By checking out the audio files of the rock version, I used UltraISO to gather a quick view of how the tracks are stored. They are just as stored as the original - in seperate tracks.
By "1-piece-image" you refer to the audio tracks being stored as one big track? Because if so, the .CUE sheet doesn't make any sense for me, since they were stored seperately on the disc. The fixed version also stores the tracks one by one seperately. Don't get me wrong, I just try to understand the mechanics behind this before I'm going to build my version of the disc