There are many creative ways to change a flat tire on an MB, but the best solution is to not get one. Buy a really good set of tires and use an x-heavy tube or a tire liner. I have heard lots of people say that tire liners slide around inside the tires. In my experience tire liners have the same problem as tires, they aren't always the size that the box says they should be in order to fit the bill. Pull a couple of different ones out at the bike shop and compare them to the tires you have.
SCHWALBE MARATHON PLUS TIRE at JensonUSA.com
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Wicked good tires.