Adrian:
As you are probably aware, the unlock code that is generated when you enter the serial number of a GPSR plus the number that comes on the coupon in the box with the new GPSR does two things:
1) It enables you to view the street level detail of the maps on your PC, and;
2) It enables you to upload map segments from the PC to the GPSR (or GPSRs) with the appropriate serial numbers.
As things sit now, assuming you have not done anything with the unlock code that came in the box with the second GPSR (your Dad's GPSR), you can view the street level detail on your PC, because you already have one unlock code in your PC for your own GPSR, but you can't upload map segments to your Dad's GPSR, because you don't have an unlock code in your PC that matches his serial number.
There is no limit to how many unlock codes you can have on a computer. By this I mean you can have unlock codes for several different map products, and also for several different serial number GPSRs. By example, I own 3 GPSR's (SP III, SP 2650 and GPSmap 296), and about 4 different map products, and I have unlock codes for all of them in my GPSR - about 7 different codes total.
The unlock code that came printed on the little slip of paper in the box with your father's GPSR is specific to that GPSR's serial number. It would not be of any use for any purpose other than unlocking the map product that came in the box with your Dad's GPSR - presumably CN Europe - so that it can be used with the serial number of the GPSR that was packed in the same box. So, do what appears obvious - enter that unlock code on your PC, this will generate a final code, then you will be able to upload map segments from your PC to both your own GPSR and to your father's PC.
After you have successfully entered the unlock code for the second GPSR, make a backup of the unlock codes stored on your PC, so you have them handy in case your computer ever burps. This is easy to do. Assuming you have the most recent release of MapSource, go to the "Utilities" menu, select "Unlock Maps", press the "Next" button, then choose "Backup my unlock codes to a file". You can put the backup on a floppy disk, if you wish. This same process can be used to send your unlock codes to a friend who also uses MapSource, so you can load appropriate map segments from someone else's computer to your own GPSR when you are travelling.
Richie's suggestion, besides being fundamentally dishonest in its intent, is also flat-out wrong from a technical point of view. Because the unlock code that comes in the box with a new GPSR is specific to the serial number of the GPSR in the box, it is useless for any other purpose than unlocking the maps for the CD and GPSR in that box. You could follow Richie's advice if you wish, however, the unlock code that came in the box with your Dad's GPSR would be useless for any other purpose, and you would lose the ability to unlock your existing map product for a second GPSR that you might purchase for your own use in the future.
PanEuropean
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