OpenJazz is compiled for the following OS’s:
You need 3 things:
SDL.dll, ModPlug.dll, OpenJazz.000 and OpenJazz.exe must be in the same directory.
You can place them in your Jazz Jackrabbit™ directory, and OpenJazz will be ready to run.
You can also run it from another directory using your Jazz Jackrabbit™ directory as a command-line option.
Eat your lima beans, Johnny.