Honestly, Morello's was probably easier than Slash's. I don't know how to explain it, but his note sequences made a lot more sense to me than the rock ones. Does that make sense??
I know, the Audioslave thing totally doesn't fit! I'm also always a little weirded out any time I hear Maynard with A Perfect Circle. Those superbands always confuse me!! I used to be an asst mgr at a Sam Goody, so I had to remember all of the links.