I have only done it once, but this worked for me. I inserted the previously removed original rivets. Then had a friend hold a body dolly on the front (data plate) side of the rivet, making sure that the data plate and rivet was tight to the door. On the back side I put a drift against the rivet and tapped lightly with a small ball-peen hammer. I stopped as soon as the plate was tight. There might be a better idea out there.
If you are using new rivets this might not work