I had mine done in a service center on Buford Highway, near the PDK airport. Arrived there, got through security, got a ticket and waited my turn. After about 1.5 hours my turn came. They had electronic scanners. They took fingerprints of all the fingers separately and then "hand-prints" of both hands. The whole process took about 20 minutes. I got a receipt saying that my fingerprints were collected at that day. It was on April 7, 2003 (over 15 months ago), so it may have changed since then.