Are you saying that you had a hard time getting the caliper back on over the new pads and rotor after pressing the piston all the way in? Sounds to me like something may be wrong. There has to be some clearance in there for the new parts to swell when heated. If there is no mechanical clearance, it will get jammed up and make even more heat until something galls or sticks.
I just did mine with Balo rotors and Textar pads and everything went fine. There was plenty of clearance going back together. Nothing was tight, nothing got hot. If you're sure you have the right parts, you might want to have .5mm or so machined off of the friction surface to give you some clearance.
Experience is something you don't get until just after you need it.