Hi - I don't use arranger "songs" either. I use Styles (on Tyros) all the time, but I play the song myself, with the Style adding the bass and drums (and a few other sounds; I often mute out some of them if the style is too "Busy" or "Full"). I play rhythmically with my left hand a lot (more than just laying a chord down), and my right hand is either playing rhymically or doing fills (if I am working with a singer), or playing a melody or "solo" if I am playing w/o vocals.

I don't really know what an arranger "song" is, unless maybe it's a MIDI file of a song? Anyway, I've never used any sort of "Song"; I use the Styles, play the chords and song myself. I know there a lot of ways to use an Arranger keyboard; this is the method I've used for many years. I kind of thought that was how most/many people used an Arranger keyboard?

-Jim