I suggest two improvements:
- Have all songs be unchecked by default, and add a "Select All" option for those who wish to import all the songs on an FTM. This will make it easier for those who have FTM's with many songs, but only wish to import a few.
- Include an option to select which instruments you would like to import from an FTM. This way, instruments that are shared between FTMs are not duplicated upon import, which uses up the allotted instrument slots.