Write back a message in a few months and tell me how your doing, i might have a few workout books for you, you can do it, believe that you're gona get up to 130 by january 2009. It's important to set goals with time limits because that pushes you if you really want it you will reach your goals.
One last thing, run sprints outside with your shirt off when the sun is out, for the vitamin d and the anabolic effect it has on your body, great sprinters are also some of the most muscular people in the world. Don't worry about what people would think all that matters is your goals.