So I've been trying to figure out how to play "Savior" by Skillet, and have most of the song figured out except for three distinct parts.

1) The acoustic riff that's being played throughout the song. For the love of me, other than the first couple of notes, I can't figure it out.

2) There's a lead guitar part during the second chorus that bamboozles me, since I'm not much of a lead player.

3) The bridge has a little palm-muted/bass? part that my sorry little ears can't pick up.

I would greatly appreciate anyone who could help me out with this.