If I remember correctly, you log in under the "Services" tab at Blitzortung.org. The "User ID" link at the left brings up a screen with information about the station, antennas, etc. that you will need to enter along with location info.
There is a place to enter the "processor ID". (Assign new Station by Processor-ID:)
Copy and paste the processor ID from the "Device ID" area on the Status page of the controller GUI. You will need to be logged into the controller for it to show up. This info is down the front status page a ways under "Controller/CPU".
I don't remember if this takes care of it right away or you need to wait a while before things start to appear. It has been a while for me, maybe someone who has recently registered can chime in.
Greg H.
