That profile file is a file that automatically gets written to the card by the unit or by Humminbird PC. You can edit info into the P1 thru 4 fields and the unit will display your custom text.
The thing that concerns me is that the Humminbird units typically only recognize up to 32 GB cards. I have seen some posts from people who say they have formatted the larger cards with Fat 32 and they will work ..... but have personally not tried it.