"fen" wrote in message
k...
The difference between Garmin blue chart mapping programs, bought either
on CD with unlock code - OR - as a PreProgrammed DataCards, is that the
first product may be installed on two Garmin GPS units, the second can
presently NOT.

That is incorrect. The info. stays on the data card so it isn't even
installed on one GPS. It can be used in multiple GPS's though. Obviously not
at the same time though.
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Darrel Goheen

http://www.tvnav.com