The chord progression goes like this.

B C# Ab B
B C# E Ebm C#

You can play them as power chords, I'm pretty sure the original goes that way, but the 
sound is a lot fuller if you're playing it like this on your own.

The chord progression changes after a while, and the only part that differs is the very 
end of the progression.

Like this.

B C# Ab B
B C# E F# C#