Day one - Half dead to Olympian

Okay not exactly half-dead, but fantastically out of shape, yes. And not really on my way to Olympian, but hopefully for a 5k finish line on December 12th, 2010. So I have a few weeks to train and today was day ONE! Run/walk for 15 minutes. Sounds like a joke to many of my marathon running friends I have no doubt, but I pretty much hate running, wasn't apparently built for running and isn't someone who looks as though they've ever run anywhere. So to run my first 5k is a BIG DEAL. Will I do it? Well, I'm supposed to BELIEVE and say YES! but honesetly I have no idea. I'm going to try, and we'll see how it goes. Tomorrow I have to run/walk for 2 miles. 2 miles!? Can I drive instead?