When I mean scales I mean...
SCALES
You don't have to read Hanon's #39 to understand what a scale is.
If you're doing four octaves, you can start the left hand two octaves down from middle C (and the right hand an octave higher from left hand of course). Then you just go up on the notes of a C major scale, four octaves, then back down. Then do the relative minor, natural, harmonic, and melodic scales four octaves.
You might as well do arpeggios following each scale because you're going to be expected to play those as well.
So, to answer your question, Chiyo, yes like Hanon's #39, but a little more elaborative and without those little chords in between.