I didn't see the MP-8866 in the config.dat, but then I didn't really look. I looked in the .ini file and it said "NO!" for support.
I don't know why you couldn't find it in the registry though... that worked fine for me. Just copy the name from the .ini file and then search for it... change all registry entries to Logitech DualAction USB and then you can change the buttons in the config.dat
I don't know why you couldn't find it in the registry though... that worked fine for me. Just copy the name from the .ini file and then search for it... change all registry entries to Logitech DualAction USB and then you can change the buttons in the config.dat