So here's the deal... I have two F500BT units. I recently bought the CNSD-150FM for the firmware and map update. I ran it on my first unit and everything worked just fine.... Now, on the second unit, I installed the first SD card and it worked fine, but when I got to the second SD card, it kept asking for a password and I soon found out that you can only use the SD cards on one unit... My question is, is there any way to update my second unit? Could I dump the files straight off the second SD card onto the 2nd unit without a problem? Is there anything else I can do to make this work? I bought