All I can say is that to do it right is TOTAL GUITAR HELL. Also, what is slightly buried in Rick's description is that the melody is being played on the high (high as in high notes) 2,1 strings as you go along. Also that you try and keep your three fingers on the right hand as close to those strings as possible always (Rick also anchors it all with his pinkie, but I can't do that -- at least not yet). DID I SAY IT WAS TOTAL HELL? (Not to discourage you or anything).
yours, Peter T.