I'll just repeat once more that even after j2b-ising the music file for first level is still too large to handle for 1.23, especially since the level itself uses a lot of memory-choking effects like ambient sounds almost everywhere and many animations. You can simply mute music in your Jazz2 before playing, this way the music file won't be loaded. Of course the downside is that you'll lose a lot of clima without the music, but if that's the only way, there is no choice. Or simply, get TSF because technically it's just better than 1.23 in all ways.