I thought I had already thanked you for that tip. Thanks a lot. But I could use another piece of advice, if you're able to help: I'm creating a game a .d64 image containing the level and title .prg files, and I'd like to pack them into a single file (perhaps in .crt format, or just a single combined file) to reduce load times. Maybe you could lend a hand, if you have the time and inclination. In any case, even if you can't, you've been a huge help... thanks, and all the best.