I'm kicking myself for not posting the best tip of all in my previous post. Place the tire in your car/truck, parked in the sun windows up. Or if you are yuppie scum like myself just throw it in the Sauna. A hot tire is so much more flexible and a pliable it practically jumps on the rim by itself.
I survived the Great Folk Music Scare of the 1960s (when it almost caught on) !