Modification to the S16 stack and adding this single game to the current multi would be more interesting... But according to older discussions in this forum about the subject - I'm not very hopeful to see that happen.
Another option is just changing the boards, if you want to run the FZIIDX. Is that PCB for sale anyway, or just one-off prototype? Date code in PCB gives a hint that it was made already nearly 4 years ago.