315 views and no answer.. and also some time passed, hope you already got it sorted.
I have no exact answer at all myself but just want to point out that you are maybe kind of behind times. There is a Neogamma R8, waninkokos cIOS 249 can be rev21. Just saying you should update at least to rev17 and if needed try rev20 or 21, see the wanin and hermes cIOS as wads (link in my sig).
Don't think there was something special on that game. Good luck