Guitar Hero III Progress

As I mentioned in a previous post, I've been playing Guitar Hero III for the Wii. I've been going through in the career mode on the expert difficulty level and have almost beat every single song. I finally beat Metallica's One, but I'm still having a little trouble with the Slayer song, Raining Blood. It really shouldn't be that difficult, but I have issues with the real fast part near the beginning. I'm sure in the next couple of days I will have beaten it though.