The answer to my own question is I have one unlock code to use. The GPS 18 is shipped fully unlocked. Thanks to Garmin Tech support for telling me I would be able to unlock both of my 60 csx with the CS software first as long as I didn't us the GPS 18. I then found out that wasn't the case. I called Garmin back and after 20 minutes and being put on hold to verifiy my story with the tech I was back in business. Garmin had deleted the GPS 18 and replaced it with my second 60 csx serial number. I was pleased. The CitySelect was cheaper with the GPS 18 bundle. I then loaded both 60 csx with maps and away I went. Mapping worked just fine. I next loaded NROUTE software and plugged my GPS 18 into my USB port, selected USB 18 for the device and whaammmooo, gps info popped up. Sitting in my livingroom, the GPS was tracking 5 to 8 sats and atleast 1 waas sat and a accuracy of 9'. I had to try out the GPS 18 and laptop. I took it for a short 3 mile spin. It tracked great, recalculate quickly and spoke promptly. I don't know if this is a mistake with the software or that the GPS 18 doesn't need an unlock code to work with NROUTE software. If I look at my unlock device in NROUTE, it shows my two 60 csx units. I guess I got the 3 unit deal for the price of two. It is unfortunate that the units don't come with more software included for the price that the units cost. Thanks to Garmin tech support for taking care of the problem. I have spoken with tech support 3 times. They have been polite, and professional. I have even been sent a nice little present to use in my automobiles for both my 60 csx. It sure does save on the batteries. Outstanding!!!