Seeing as how this topic is around, and I'm having problems with JJ1 (and, incidentally, the same problem with Stargunner), I shall post here.

Okay. So. I load up JJ1, and it runs fine. I'm able to watch the intro movie, see the main menu, select New Game, difficulty, and episode. However, once I get into actual gameplay, the display flicks to black and fades in, over and over again about every second, and the music skips slightly. I'm getting a sneaking feeling that this has to do with expanded memory services. I've seen a few messages that I don't have EMS support, but I don't know what I'm supposed to do about it. Any suggestions?