Ja2 developer Tron notified me about this possibility, so here's a demo release. You can have both versions installed. Demo's data directory goes to /media/mmc1/share/ja2demo. If the demo doesn't start from the menu, try running jaggeddemo in xterm to see the error message. If you want to use some other path, just issue this command in xterm: echo "data_dir = /path/to/game/data" > /home/user/.ja2demo/ja2.ini. I'll ask Arnims to update the first post, but here's a link to the package: ja2_0.8-demo.deb