sorry I had left out the dreamcast "controller" to ipac adaptor
it is an adaptor that allows the ipac's to plug into the dreamcast and saves the hassle of hacking and hard wiring the stock controllers to the buttons and joysticks and with this adapter it makes it a plug and play swap and avoids all the hassle of having to do wires over or tap into your current Control panel..
but none the less I think they do work with the J-pac and they enable light guns so it may work with them but I have no clue and have not asked around about that yet but it would be nice
