How to train for a marathon?

Anonymous
So I want to start training for the new york marathon 2012. But I am cluless on running. I am 5'8 at 250lbs and I would be starting at square zero. Some suggested that I start walking a mile a day but since I walk a lot to begin with, one mile would be nothing. Are there any good sites on how to start training for the marathon? plus what's the best place to find running shoes? Also nutrition wise what's the best diet to do this?
How to train for a marathon?
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