Marathon Training Programs

Call me INSANE, but apparantly I have the guts to sign up for the Ogden Marathon for next year.  I have decided that now is my time, regardless of the awful half I just did.  Training is HARD on me.  My body does not like the fact that my mind wants to run. :0)  My hip, knee, and feet have the biggest troubles.  I know that I will not be able to finish without ever walking a step, so I am looking into training methods that will help me keep the energy I need to finish it alive.  I am interested in Jeff Galloway, but it seems that running for only a few minutes than walking for a minute (and doing this for 5 hours) is a bit much.  I don't want to have to watch my clock for 5 hours (though maybe it will keep me busy and keep my mind off the pain--that could be good!)  Anyway, what training programs have you used? Anything you suggest?  Unless I get all my issues worked out, I probably can't run more than 3 days a week so I have to avoid all those real intense programs.  Thanks for any advice you could give me!