Sorry for the delay, I've been battling a cold.
Here's the video for the riff to Superstition. I had to record it with my webcam which didn't come out the best, and I realised afterwards that the angle doesn't really show what's going on.
Hopefully it shows enough for you to be able to understand what's going on. I'll have to try set up my camera so I can take higher quality video. I might even have a live recording of it after this weekends gig!
I'll post the tab for the pre-chorus section of Superstition tomorrow!