(then G-D-P should provide in /usr/share/games/jazz-jackrabbit-hh95 a symlink to /usr/games/OpenJazz to makes it work ?)
When I did my initial testing, the HH95 path just needs to be provided as a command-line argument to openjazz. For example: $ OpenJazz /usr/share/games/jazz-jackrabbit-hh95 Once the game is started, the menu item for 'Episode X' will run the HH95 levels instead of the HH94 levels included with the full game. It seems to find the existing game data files in the jazz-jackrabbit folder just fine, even if the only such file is openjazz.000. If run without the main game data present, the other episodes will just be disabled on the main menu. Ryan