He thinks the last few songs on hard are impossible? He's lucky he didn't get to Lou on hard. My sister, whose both beaten the last two Guitar Heroes on expert and almost never gets mad at games, reguardless how cheap or how much they cheat, was yelling and cussing at the damn TV trying to beat him. (Sorta like what I do for every other game I play =P)
I ended up being her spotter telling her what power-ups Lou gets, and generally watching his section of the song for the best time to throw off her power-ups. Took like another dozen attempts but she finally narrowed finished him off during his last solo. Just watching was annoying because the computer never misses a damn note so the only way to win is to throw everything you have at once during a big solo and big another power-up immedately afterwards before he recovers.
She can't even practice the damn song since Lou is constantly throwing annoying as attacks at you. =P