Sorry but I don't understand all the details.
If you wanted the equipment ground seperate from the nutral then you need a ground bar kit.
If the service panels are the first disco then the equip ground would go to the nutural. If you have more then 1 panel serving as the service disco the all would have the equip. ground on the nutural.
We don't use non metalic for our services so I can't be of more help.
Tom
