I recently purchased a used 996XT (from the RR Classifieds). I'm trying to figure out how to find the ESN requested by Uniden when I tried to register the radio with them. Additionally, I have an older 780XLT that I would like to reprogram. My computer doesn't 'see' the radio when hook it up to the computer. I'm running XP on the computer and ARC software for both radios... Thanks!