We've managed to decompile the code and reworked it so it is in a compilable working state:
We also have a version that is completely refactored so it is not one gigantic file with inner classes, but one broken up into multiple top level classes.
For anyone interested, let us know.
We had originally thought that this was code that was worth building on. But we were sadly disappointed.
Anyway, best of luck to others who are interested in this code.