Ok, time to break out that tapping finger! Before cutting into this one, look at this video and the next one as I explain my view of, and approach to tapping. This could help you immensely when attempting these things, and especially when later on improvising yourself.
I would first recommend that you go through Sean Conklin's Finger Tapping tutorial, which is a great entry level tutorial for you to get a grasp of the technique. My approach to tapping differs somewhat from Sean's, but it is very good if you are aware of both approaches, and can see what fits you best.