DucesWild, Thanks for your reply. I guess what I'm wondering is, for this particular lesson, in which we are just exploring combining major scales with chord patterns, if it would be acceptable to just pluck the strings with your index finger (when you're playing individual scale notes) and then use your thumb to "strum" the chord?
This is what I observed Justin to do in the next lesson, FO-105 Easy Happy Birthday. Towards the end of the lesson (around 9:18) he demonstrates how to insert "scale playing" in between the regular melody and chords, and uses this sort of fingering.
Anyway, in lesson FO-104 he doesn't explicitly state what the right hand should be doing, but I kind of suspect he's using his thumb and index finger in much the same way as he is towards the end of lesson FO-105.
It would be great to hear from Justin and to have him confirm that this is, indeed, the way he intended us to practice lesson FO-104 or if, alternatively, we should be using the folk fingerstyle fingering as he demonstrated in the first two lessons (FO-101 and FO-102).