Moving the center of the rim would probably be the best solution for running Hummer wheels. I personally like the way they look with the 7.25" backspacing. Plus it was a lot cheaper to buy the dually hubs for the front, and dually adapters in the rear. I bought the dually adapters for $100 used and the dually front hubs for $175 I think.
With the daully hubs and adapters on the Dana 60/14 bolt, it equals out to 3.25" backspacing over SWH setups.
You could just carry a spare tire and mount it on the wheel without even taking the wheel off the truck, but it is so hard and time consuming to mount large tires on these wheels, I have a fully setup spare wheel and tire.
For information, I ended up buying 5 new civilian takeoff rims and runflat/beadlocks from a Hummer dealership for $500 delivered. I could have got the bias tire military rims with the magnesium runflat/beadlock setup for $50 each, I just heard to many things about them versus the late model civy wheels and one piece rubber beadlock/runflat.