We recently published an article, with video, on how to repair your tire if you're in the backcountry and have major sidewall damage. Check out the article at:

http://online.jpfreek.com/2010/09/01/tire-clinic-major-sidewall-repair/

Hmmm.... A friend of mine just put a tree branch through his 32x11.50x15 tire..... Since the tire is trash, might be interesting to try this and see what happens....

Nice source, thanks