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  1.     
    #1

    Default Help, CN NA map for GPSMAP 64s

    I would like to add a copy of CN NA to my GPSMAP 64s. I saw 34Travel54 post and link (# 10) in the CN NA NT 2019.20 thread and his remark "gmapprom.img unlocked and tested with latest firmware. This is all you need for handhelds". I used 7-Zip to unzip and combine the 9 files, which yielded a gmapprom.7z file. I have tried renaming the file several different ways, but nothing is recognized by my GPS. The file is being added to my SD card. What am I doing wrong?

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    Wild Bill Reviewed by Wild Bill on . Help, CN NA map for GPSMAP 64s I would like to add a copy of CN NA to my GPSMAP 64s. I saw 34Travel54 post and link (# 10) in the CN NA NT 2019.20 thread and his remark "gmapprom.img unlocked and tested with latest firmware. This is all you need for handhelds". I used 7-Zip to unzip and combine the 9 files, which yielded a gmapprom.7z file. I have tried renaming the file several different ways, but nothing is recognized by my GPS. The file is being added to my SD card. What am I doing wrong? Rating: 5

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  3.     
    #2
    I tried again this time using RAR. The GUI was slightly different and I noticed a slight change that made the conversion to the file that worked.

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