Nice Mos jan!!! By the way, get a LOT of WD40. That stuff does wonders for rusted bolted. Just let it soak for a bit (a few minutes to a day) and you'll be amazed at how things open.
As far as the shaking, it could be as easy as tire pressures, tire balancing, to as complicated as drive shaft, u-joint, steering loose, etc. By the way, why only change 1 rotor? Usually one changes those in pairs