the drum should just come off after you pull the wheel off. pull it until it comes off. If it doesn't come right off, I would just tap it around the edge of the drum with a hammer until it starts to break loose. if it's really stuck, you could put two bolts that match the thread pattern of the threaded holes in the drum and wrench them down until they hit the hub face and "push" the drum off the hub. I do that maybe once a month though, and I work on tons of honda/acura in a month.