1. No not at all, fbi does that automatically by checking the title id.
2. I didn't had any problems but found a solution for BGM, don't know if it still works:
For the looping issues, open the BGM file in loopingaudioconverter and open the dropdown menu under "for non-looping files" and select the force loop option and it should loop indefinitely on your home menu. (just make sure you select "convert to BCSTM" or else it'll convert the file into whatever the default selection is)
3. It should be good after rebooting.
2. I didn't had any problems but found a solution for BGM, don't know if it still works:
For the looping issues, open the BGM file in loopingaudioconverter and open the dropdown menu under "for non-looping files" and select the force loop option and it should loop indefinitely on your home menu. (just make sure you select "convert to BCSTM" or else it'll convert the file into whatever the default selection is)
3. It should be good after rebooting.