@aekhong, yes, but not just a header/footer copy! I replaced the POIs inside to make a test. I can also make a poi file without the logo and just the text. I have some knowledge on how to add categories inside the file. All lis pretty straight forward. There is also some funny stuff to add for old gps compatibility. I'll probably modify Extra_POI_Editor to generate .gpi files. There is a lot of work involved. I just wonder if I will generate encrypted POIs to preserve Garmin`s secrets or unlocked POI files and be copied by everybody making softwares like mine...

@muntunnus, Thanks for the file. With your file, I have enough examples for what I need to do.