Thanks for the tips. I will definitely try that on COP, but as I tend to get overwelmed on the second guitar solo. My fingers just can't move that fast without missing a few notes.
And the Jackpot power-up on Shout is useless to me with the random skipping I experience on any of the songs so I'm going to have to somehow get it with another combination of power-ups. Maybe the flame/bomb/super guitar.