From the belay for Hardrocker, climb up and left the same as Hardrocker. Where Hardrocker moves off right continue straight up folling the bolts. There may be some gear placements at the bulge, I can't remember at this point. A good route harder then Hardrocker. Rap down via the Classic Crack Rappel using two ropes.
Rockin' Harder is a route that I put up after looking at the line for years and backing off of it once or twice before Hardrocker was put up. I believe that I finally did it with Dave Larsen a few years after Hardrocker went in.