Possibly. These inserts cost about $3,000-4000, so you initial cost is not cheap. The insert is supposed to keep more heat in your house than a fireplace without one. It seems you need a good air circulation fan from your furnace that you can run to get the heat moved around your house.
Be sure to read all the comments to the linked article–they cover a lot of the pros and cons to having an insert. They also discuss the pros and cons of corn pellet stoves.
Click title for link at ThisOldHouse.