Couch to 5K

I LOVE to run...BUT I was diagnosed with asthma at the age of 10. I have seen the people on the Biggest Loser for the last few seasons run/walk marathons and I finally decided that by golly I'm gonna do it too (only smaller). I hope I don't have to walk to the whole thing, but even if I do I'M DOING THIS! For me, it's more about setting the goal and accomplishing it, than the actual run. But that'll be pretty amazing too! I have seen numerous people post about the Couch to 5K, so I'm gonna try it and we'll see what happens.