[autowrench]

Lube it up well and break the bead thoroughly. You will need to push or shock the outer ring down far enough to allow the inner ring to be pried out of its groove. Then work it up and out of the groove, taking care to not deform the ring. As you would with the one piece rings. You may need to use more than one tool to pry it out of the retaining groove and work it around the wheel. Take it slow. It's much the same as one piece rings, you just have to get the outer ring clear of the inner one to make it happen. The back bead and everything else should be the same as you have done before. Good Luck! I hope you have an inflation cage you can use if you decide to reassemble the tire and wheels later. Hope this helps!
Tom