That image has the intro groove (for lack of better words). Personally, I don't think this is Danny's hardest work; I've been able to learn everything except the solo in The Grudge. I can go right until just after the long tom roll. I started on it about a week ago, I say I'll have it down in a fortnight. 'Ticks And Leeches' is one of the more impressive sounding tracks as far as drums are concerned, but the difficulty isn't higher as most people seem to believe.
It's all muscle memory as far as that intro goes, and the rest really is simple. Read over the tabs, start off slow, and you'll be blazing it in no time.