Center Hub nut? Why did you remove that?? 
The caliper is bolted on from behind with two 17MM bolts. (you probably know that already)
The rotor is just press fit onto the hub. turn the steering wheel all the way to the direction of the side you are trying to remove, and with the caliper secure and tied away (or removed completely if you're willing to bleed your lines) whack the back of the rotor's edge with a rubber mallet. HARD. keep the lug nuts on at least 2 of the three lug bolts, unless you want the rotor to go flying off the hub, and hit the ground. (makes a wonderfully musical noise, but do't do it. trust me)
That's all there is to it. honest. Unless your's are so rusted that they won't budge, then bath the lug bolts in wd40 for half an hour. The fluid will seep inside, behind the rotor somewhat, and may help.
Good luck dude.
Elton
The caliper is bolted on from behind with two 17MM bolts. (you probably know that already)
The rotor is just press fit onto the hub. turn the steering wheel all the way to the direction of the side you are trying to remove, and with the caliper secure and tied away (or removed completely if you're willing to bleed your lines) whack the back of the rotor's edge with a rubber mallet. HARD. keep the lug nuts on at least 2 of the three lug bolts, unless you want the rotor to go flying off the hub, and hit the ground. (makes a wonderfully musical noise, but do't do it. trust me)
That's all there is to it. honest. Unless your's are so rusted that they won't budge, then bath the lug bolts in wd40 for half an hour. The fluid will seep inside, behind the rotor somewhat, and may help.
Good luck dude.
Elton