Where, as in folder, on my andriod device do I store the import.txt file and the songs I want to import? I'm assuming they have to be in the same folder/directory for the SLM import command to read the file name and then import that file.
I'm not sure what you want to do. If you're importing ChordPro files, you don't need an import.txt file, because ChordPro files contain song info like title, artist, tempo, etc.
You say that the file format can be in text format for mass importing. If the songs in my text file are typed using chordpro format ( [C]This is one chord, going to [Am]another) is SLM able to render the chords in the right location above the lyrics? If so, then I'll just resave my chordpro songs as .txt - does this seem like a reasonable workaround?
Yes, Set List Maker will position chords inserted with square brackets, as in a ChordPro file. But what problem are you trying to work around?