You will need to wire a Capcom wirring harness in to the cabinet. JAMMA is not a brain, it is a standard. It is basicly a pin-out standard for arcade games that allow any JAMMA wired system (harness) plug into a JAMMA board. The Neo Geo and the CPS2, however are not true JAMMA, the same with boards like Mortal Kombat 4. The JAMMA standard allows for three buttons to each controler, so these games have special harnesses that allow the other buttons to work. Everything else is the same, except the sound on the CPS2 which is wired a little different (since it is stereo). You can plug any JAMMA game onto the Neo Geo harness, but you will be limited to the 4 button layout (which I believe on the CPS2 maps to 3 punches and one kick)... You can get around this by having 6 - 4 - 5? button control panels that you can make for your cabinet... or you can convert it everytime you want to play a game. I have seen some beatiful cabs made up with serial type cables that connect the CPs in. Every control panel is wired to a serial cable then a female plug goes back to a harness wired for six buttons. The Neos can use a 4 panel, the CPS2 a 6. God, I am probably confusing the hell out of you right now, cause I know I am not describing this very well. If you would like, e-mail me and I may be able to point you in the right direction to begin creating a setup like this. Anyway, hope this helped a little
-Nick