My brother buys these tires from the gov and resells them. We dismount them at the shop...goes something like this...
1. Break bead (ring) with hyd press, pound a piece of tube between bead ring a lock ring, rotate and repeat 3-4x. (Watch out for the ring when it comes loose!)
2. Flip over, put wheel on 5" high tube, put big piece of tube on tire, press down on it to press wheel out of tire/runflat.
3. Pry tire/ runflat to the side, thread chain or strap thru, chain runflat to floor, lift tire sideways with forklift.
It's a lot of work, but worth it. The tires are awesome. Work good off road, and smooth on hwy. I really like XMLs, but they're hard to find.
If you don't have a facilities, take 'em to truck tire place, or I'd do the sawzall thing and cut it all to bits except the tire.