I didn't have too much problem breaking them loose by using a 2-ft tire iron and a 1/2" drive socket wrench, adapter, and 3/8" drive 10mm hex socket. I clamped the old defenseless rotor in a vise vertically, and then threaded back in two lug bolts. Then I used the tire iron through the lug bolts and against the hub to hold the assembly while I loosened the rotor bolts on the other side with the socket wrench. Maybe I didn't have as much corrosion as some people.
And to think ahead, don't forget to coat the rotor bolts with blue locktight before you assemble the new rotor to the hub with them. Generally speaking, you don't want these bolts to come loose again on the road.
I think the torque spec is around 80-100 ft-lbs.
Ken300D