Ron is correct. Cardio combined with weight training is the key to shaping, but keep in mind that it's not possible to spot reduce. If you want to have a flat stomach and thinner legs, it will take some diet modifications (resulting in overall fat loss) in addition to the exercise. Good luck, and hope to see you around.
"If you drop an egg, you don't say, 'Oh, shoot' and drop the other 11, do you?"
-Source unknown, but obviously brilliant
Reached goal 4/16/2010...but kind of afraid to look these days