Doable but not overnight (Score 1)

I had the exact same problem almost a year ago. Since then I have lost 30-40 pounds by just walking (2 hours a day, 5 days a week) but if you use an elliptical machine you can probably limit this to 30-60 minutes a day and get the same effect. It takes a while, at least 3-4 months to loose all the weight but it is definitely worth while.