Hardest part? I dunno, the entire song alternated between easy and cool sounding with complicated and fast every other measure.
The intro riff is of course:
B-0-4p0-7p0-4p0-7p0-4p0-7p0-4p0-7p0 x2 (pull off 4, 7)
B-5p0-8p0-5p0-8p0-5p0-8p0-5p0-8p0 x2 (pull off 5, 8)
B-12p0-10p0-9p0-10p0-9p0-7p0-9p0-5p0-7p0-4p0-5p0-4p0-5p0-4p0-5p0-4p0- xAs necessary
(pull off 12, 10, 9, 10, 9, 7, 9, 5, 7, 4, 5, 4, 5, 4, 5, 4)
There's not really alot to say here technique wise. I still love this song.
Two changes to note:
1. Live version and recorded version (which I used the tabs for), have different solos.
2. RB2 and Track Pack version are different. RB2's version requires you to strum every other note in the intro, on the track pack the infamous opening is one long HOPO.