Photoshop bicycle

Hello, I have a picture of our bicycle (see attachment 1) and need to show what it would look like as an "electric bicycle" (see attachment 2) . This means that three changes need to be made to this picture. 1. Rack with battery pack on back. 2. Rear wheel needs to be changed to show different electric hub. 3. Small computer on handlebars. I am attaching the following pictures: 1. Our bicycle 2. A bicycle with the electric parts 3. The rear rack with batter 4. Close up of electric hub 5. Close up of computer (not necessary to show much detail on photo) This picture will be eventually used on this page: [login to view URL] So we're looking for a picture that will work well here. The winning bid will probably be chosen based on their time frame and submission of a mock-up. thanks