Difficulty installing new folding bead tires I'm an amateur cyclist trying to change worn out tires for the first time. I ordered some new tires from Amazon and got them in folded form.

The tires are flat like a belt and just won't go on the wheel. I bend them from the edges but they go back to being a flat belt like shape. Is there some special procedure I need to do to get them in shape or are these faulty?
The procedure is mounting the tires on rims and inflating them. When mounting the first bead of the tire, it helps to keep the part already on rim pulled tight so that it does not fall off the rim.